little cleanup in gradle file

add crash reporting

.gitignore

@@ -15,4 +15,5 @@ gradle/
 build/
 gradlew*
 *.jks
-gradle.properties
+gradle.properties
+google-services.json

build.gradle

@@ -7,6 +7,7 @@ buildscript {
     dependencies {
         classpath 'com.android.tools.build:gradle:2.3.3'
         classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.3'
+        classpath 'com.google.gms:google-services:3.2.0'
     }
 }
 
@@ -19,6 +20,9 @@ allprojects {
         min_sdk_version = 21
         target_sdk_version = 27
         build_tools_version = '27.0.3'
+
+        support_lib_version = '27.1.0'
+        gms_version = '11.8.0'
     }
 }
 
@@ -146,21 +150,23 @@ repositories {
     google()
 }
 
-final String SUPPORT_LIBS_VERSION = '27.0.+'
 dependencies {
-    compile "com.android.support:support-v4:${SUPPORT_LIBS_VERSION}"
-    compile "com.android.support:support-dynamic-animation:${SUPPORT_LIBS_VERSION}"
-    compile "com.android.support:recyclerview-v7:${SUPPORT_LIBS_VERSION}"
-    compile "com.android.support:palette-v7:${SUPPORT_LIBS_VERSION}"
+    compile "com.android.support:support-v4:$support_lib_version"
+    compile "com.android.support:support-dynamic-animation:$support_lib_version"
+    compile "com.android.support:recyclerview-v7:$support_lib_version"
+    compile "com.android.support:palette-v7:$support_lib_version"
     compile 'com.google.protobuf.nano:protobuf-javanano:3.0.0-alpha-7'
 
+    compile "com.google.firebase:firebase-core:$gms_version"
+    compile "com.google.firebase:firebase-crash:$gms_version"
+
     testCompile 'junit:junit:4.12'
     androidTestCompile "org.mockito:mockito-core:1.9.5"
     androidTestCompile 'com.google.dexmaker:dexmaker:1.2'
     androidTestCompile 'com.google.dexmaker:dexmaker-mockito:1.2'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test.uiautomator:uiautomator-v18:2.1.2'
-    androidTestCompile "com.android.support:support-annotations:${SUPPORT_LIBS_VERSION}"
+    androidTestCompile "com.android.support:support-annotations:$support_lib_version"
 }
 
 protobuf {
@@ -185,3 +191,5 @@ protobuf {
         }
     }
 }
+
+apply plugin: 'com.google.gms.google-services'