[Benchmark] update to use benchmark gradle files

Change-Id: I83f5f4c45f4dbeaab1100dd0ab9ca531181914d7
diff --git a/Wearable/build.gradle b/Wearable/build.gradle
index d893535..6a78fd9 100644
--- a/Wearable/build.gradle
+++ b/Wearable/build.gradle
@@ -34,30 +34,6 @@
         versionCode 1
         versionName "1.0"
     }
-    signingConfigs {
-        debug {
-            storeFile file(iosched14_android_debugkey_storefile)
-            storePassword iosched14_android_debugkey_storePassword
-            keyAlias iosched14_android_debugkey_keyAlias
-            keyPassword iosched14_android_debugkey_keyPassword
-        }
-        release {
-            storeFile file(iosched14_android_releasekey_storefile)
-            storePassword iosched14_android_releasekey_storePassword
-            keyAlias iosched14_android_releasekey_keyAlias
-            keyPassword iosched14_android_releasekey_keyPassword
-        }
-    }
-
-    buildTypes {
-        debug {
-            debuggable true
-            signingConfig signingConfigs.debug
-        }
-        release {
-            signingConfig signingConfigs.release
-        }
-    }
 
     lintOptions {
         abortOnError false
diff --git a/android/build.gradle b/android/build.gradle
index 6036db7..1b29909 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -14,6 +14,9 @@
  * limitations under the License.
  */
 
+apply from: "../../commonHeader.gradle"
+apply from: "../../commonLocalRepo.gradle"
+
 apply plugin: 'com.android.application'
 
 repositories {
@@ -32,30 +35,10 @@
         targetSdkVersion 21
     }
 
-    signingConfigs {
-        debug {
-            storeFile file("../android/debug.keystore")
-            storePassword "android"
-            keyAlias "androiddebugkey"
-            keyPassword "android"
-        }
-        release {
-            storeFile file("../android/debug.keystore")
-            storePassword "android"
-            keyAlias "androiddebugkey"
-            keyPassword "android"
-        }
-    }
-
     buildTypes {
-        debug {
-            debuggable true
-            signingConfig signingConfigs.debug
-        }
         release {
             minifyEnabled true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), file('proguard-project.txt')
-            signingConfig signingConfigs.release
         }
     }
 
diff --git a/build.gradle b/build.gradle
index bf3a80f..0c7a1f1 100644
--- a/build.gradle
+++ b/build.gradle
@@ -15,12 +15,5 @@
  */
 
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
-buildscript {
-    repositories {
-        mavenCentral()
-    }
-    dependencies {
-        classpath 'com.android.tools.build:gradle:1.0.0'
-    }
-}
-
+apply from: "../commonHeader.gradle"
+buildscript { apply from: "../commonBuildScript.gradle", to: buildscript }