[android] Upgrade project to FB v11.0.0

android/build.gradle

@@ -2,13 +2,13 @@
 // YES, jcenter is required twice - it somehow tricks studio into compiling deps below
 // doesn't break anything anywhere else and projects using this lib work as normal
 buildscript {
-    ext.firebaseVersion = '10.2.6'
+    ext.firebaseVersion = '11.0.0'
 
     repositories {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.3'
+        classpath 'com.android.tools.build:gradle:2.3.2'
     }
 }
 // END
@@ -18,10 +18,9 @@ apply plugin: 'com.android.library'
 android {
   compileSdkVersion 25
   buildToolsVersion "23.0.3"
-
   defaultConfig {
     minSdkVersion 16
-        targetSdkVersion 25
+    targetSdkVersion 26
     versionCode 1
     versionName "1.0"
     multiDexEnabled true
@@ -31,6 +30,8 @@ android {
       minifyEnabled false
     }
   }
+  productFlavors {
+  }
 }
 
 // START - required to allow working on this project inside Android Studio