Update gradle wrapper

Code coverage is disabled in V2 to workaround
https://code.google.com/p/android/issues/detail?id=226070

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137032839

build.gradle

@@ -19,7 +19,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.2'
+        classpath 'com.android.tools.build:gradle:2.2.1'
         classpath 'com.novoda:bintray-release:0.3.4'
     }
 }

gradle/wrapper/gradle-wrapper.properties

-#Thu Sep 01 11:39:15 BST 2016
+#Mon Oct 24 14:40:37 BST 2016
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.10-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip

library/build.gradle

@@ -35,9 +35,11 @@ android {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
         }
-        debug {
-            testCoverageEnabled = true
-        }
+        // Re-enable test coverage when the following issue is fixed:
+        // https://code.google.com/p/android/issues/detail?id=226070
+        // debug {
+        //     testCoverageEnabled = true
+        // }
     }
 
     lintOptions {