Bump all the android projects to target API 27

Author: SandroMachado

RNTester/android/app/build.gradle

@@ -83,13 +83,13 @@ def enableSeparateBuildPerCPUArchitecture = false
 def enableProguardInReleaseBuilds = false
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.1"
+    compileSdkVersion 27
+    buildToolsVersion "27.0.2"
 
     defaultConfig {
         applicationId "com.facebook.react.uiapp"
         minSdkVersion 16
-        targetSdkVersion 23
+        targetSdkVersion 27
         versionCode 1
         versionName "1.0"
         ndk {

RNTester/android/app/src/main/AndroidManifest.xml

@@ -18,7 +18,7 @@
 
   <uses-sdk
     android:minSdkVersion="16"
-    android:targetSdkVersion="23" />
+    android:targetSdkVersion="27" />
 
   <application
       android:name=".RNTesterApplication"

ReactAndroid/build.gradle

@@ -231,12 +231,12 @@ task packageReactNdkLibsForBuck(dependsOn: packageReactNdkLibs, type: Copy) {
 }
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.1"
+    compileSdkVersion 27
+    buildToolsVersion "27.0.2"
 
     defaultConfig {
         minSdkVersion 16
-        targetSdkVersion 22
+        targetSdkVersion 27
         versionCode 1
         versionName "1.0"
 

build.gradle

@@ -6,7 +6,7 @@ buildscript {
         mavenLocal()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.2'
+        classpath 'com.android.tools.build:gradle:2.3.3'
         classpath 'de.undercouch:gradle-download-task:3.1.2'
 
         // NOTE: Do not place your application dependencies here; they belong
@@ -18,6 +18,7 @@ allprojects {
     repositories {
         jcenter()
         mavenLocal()
+        google()
 
         def androidSdk = System.getenv("ANDROID_SDK")
         maven {

local-cli/templates/HelloWorld/android/app/build.gradle

@@ -94,13 +94,13 @@ def enableSeparateBuildPerCPUArchitecture = false
 def enableProguardInReleaseBuilds = false
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.1"
+    compileSdkVersion 27
+    buildToolsVersion "27.0.2"
 
     defaultConfig {
         applicationId "com.helloworld"
         minSdkVersion 16
-        targetSdkVersion 22
+        targetSdkVersion 27
         versionCode 1
         versionName "1.0"
         ndk {

local-cli/templates/HelloWorld/android/build.gradle

@@ -16,6 +16,8 @@ allprojects {
     repositories {
         mavenLocal()
         jcenter()
+        google()
+
         maven {
             // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
             url "$rootDir/../node_modules/react-native/android"