Restructured the 'multiproject' test project.

- Renamed packages to 'com.example.android'.
- Added a second library.
- Moved some code from app to library project.

Change-Id: If37d5fa07f4c120a452179767492b9582ff24027
diff --git a/testapps/multiproject/build.gradle b/testapps/multiproject/build.gradle
index 0c73a9f..c0bebba 100644
--- a/testapps/multiproject/build.gradle
+++ b/testapps/multiproject/build.gradle
@@ -6,3 +6,11 @@
         classpath 'com.android.build:gradle-android:0.1-SNAPSHOT'
     }
 }
+
+allprojects {
+    version = '1.0'
+
+    repositories {
+        mavenCentral()
+    }
+}