Increase gradle version to 2.10 and Android Plugin for Gradle to 1.5.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=117226973

build.gradle

@@ -20,7 +20,7 @@ buildscript {
         jcenter()
         jcenter()
     }
     }
     dependencies {
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.2.3'
+        classpath 'com.android.tools.build:gradle:1.5.0'
         classpath 'com.novoda:bintray-release:0.3.4'
         classpath 'com.novoda:bintray-release:0.3.4'
     }
     }
 }
 }

gradle/wrapper/gradle-wrapper.properties

-#Mon Dec 22 10:29:11 CST 2014
+#Tue Feb 23 12:44:36 GMT 2016
 distributionBase=GRADLE_USER_HOME
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.2.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.10-all.zip