title: Firebase Authentication Failing with flutter app
body: <p>Firebase Authentication with flutter app failing with the error below
  Launching lib/main.dart on TECNO LA7 in debug mode...
  Initializing gradle...
  Resolving dependencies...
  Running Gradle task 'assembleDebug'...
  Note: /Users/mac/Downloads/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core-0.4.0+5/android/src/main/java/io/flutter/plugins/firebase/core/FirebaseCorePlugin.java uses unchecked or unsafe operations.
  Note: Recompile with -Xlint:unchecked for details.
  Built build/app/outputs/apk/debug/app-debug.apk.
  Installing build/app/outputs/apk/app.apk...
  Syncing files to device TECNO LA7...
  D/HWUIExtension(11822): MTKProgramCache.generateProgram: 562984313159681
  D/HWUIExtension(11822): createProgram 0x0002000800000001, binary 0x8517f6c8, length 11771, format 37168 within 1349ns
  W/IInputConnectionWrapper(11822): getTextBeforeCursor on inactive InputConnection
  W/IInputConnectionWrapper(11822): getTextBeforeCursor on inactive InputConnection
  W/IInputConnectionWrapper(11822): getSelectedText on inactive InputConnection
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822): Failed to handle method call
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822): java.lang.IllegalStateException: FirebaseApp with name [DEFAULT] doesn't exist. 
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at com.google.firebase.FirebaseApp.getInstance(com.google.firebase:firebase-common@@17.0.0:269)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at io.flutter.plugins.firebaseauth.FirebaseAuthPlugin.getAuth(FirebaseAuthPlugin.java:78)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at io.flutter.plugins.firebaseauth.FirebaseAuthPlugin.onMethodCall(FirebaseAuthPlugin.java:119)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:201)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:88)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:219)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at android.os.MessageQueue.nativePollOnce(Native Method)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at android.os.MessageQueue.next(MessageQueue.java:325)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at android.os.Looper.loop(Looper.java:142)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at android.app.ActivityThread.main(ActivityThread.java:6524)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at java.lang.reflect.Method.invoke(Native Method)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:888)
  I/flutter (11822): Error: PlatformException(error, FirebaseApp with name [DEFAULT] doesn't exist. , null)
  I/zygote  (11822): Do partial code cache collection, code=30KB, data=28KB
  I/zygote  (11822): After code cache collection, code=30KB, data=28KB
  I/zygote  (11822): Increasing code cache capacity to 128KB
  E/libPowerStretch(11822): LucidStats currentFPS = 2.01 [2305329520]
  E/libPowerStretch(11822): LUCID Battery Level = 41% Battery Temp = -100 Cpu Temp = -100
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822): Failed to handle method call
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822): java.lang.IllegalStateException: FirebaseApp with name [DEFAULT] doesn't exist. 
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at com.google.firebase.FirebaseApp.getInstance(com.google.firebase:firebase-common@@17.0.0:269)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at io.flutter.plugins.firebaseauth.FirebaseAuthPlugin.getAuth(FirebaseAuthPlugin.java:78)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at io.flutter.plugins.firebaseauth.FirebaseAuthPlugin.onMethodCall(FirebaseAuthPlugin.java:119)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:201)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:88)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:219)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at android.os.MessageQueue.nativePollOnce(Native Method)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at android.os.MessageQueue.next(MessageQueue.java:325)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at android.os.Looper.loop(Looper.java:142)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at android.app.ActivityThread.main(ActivityThread.java:6524)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at java.lang.reflect.Method.invoke(Native Method)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
  E/MethodChannel#plugins.flutter.io/firebase_auth(11822):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:888)
  I/flutter (11822): Error: PlatformException(error, FirebaseApp with name [DEFAULT] doesn't exist. , null)
  E/libPowerStretch(11822): LucidStats currentFPS = 2.22 [2305329520]
  E/libPowerStretch(11822): LUCID Battery Level = 41% Battery Temp = -100 Cpu Temp = -100
  E/libPowerStretch(11822): LucidStats currentFPS = 2.00 [2305329520]
  E/libPowerStretch(11822): LUCID Battery Level = 41% Battery Temp = -100 Cpu Temp = -100
  E/libPowerStretch(11822): LucidStats currentFPS = 2.00 [2305329520]
  E/libPowerStretch(11822): LUCID Battery Level = 42% Battery Temp = -100 Cpu Temp = -100
  E/libPowerStretch(11822): LucidStats currentFPS = 2.00 [2305329520]
  E/libPowerStretch(11822): LUCID Battery Level = 42% Battery Temp = -100 Cpu Temp = -100
  E/libPowerStretch(11822): LucidStats currentFPS = 2.00 [2305329520]
  E/libPowerStretch(11822): LUCID Battery Level = 42% Battery Temp = -100 Cpu Temp = -100
  E/libPowerStretch(11822): LucidStats currentFPS = 2.00 [2305329520]
  E/libPowerStretch(11822): LUCID Battery Level = 42% Battery Temp = -100 Cpu Temp = -100
  E/libPowerStretch(11822): LucidStats currentFPS = 2.00 [2305329520]
  E/libPowerStretch(11822): LUCID Battery Level = 42% Battery Temp = -100 Cpu Temp = -100</p>