Change the bundled library extenstion to aar.

Change-Id: Idd136dab16a0f8f798e2c09830d0f4d77824a22c
diff --git a/testapps/repo/library/build.gradle b/testapps/repo/library/build.gradle
index e528d3f..90ed7b6 100644
--- a/testapps/repo/library/build.gradle
+++ b/testapps/repo/library/build.gradle
@@ -10,7 +10,7 @@
 apply plugin: 'maven'
 
 repositories {
-    mavenLocal()
+    maven { url '../testrepo' }
     mavenCentral()
 }
 
@@ -29,7 +29,7 @@
 uploadArchives {
     repositories {
         mavenDeployer {
-            repository(url: uri("../repo"))
+            repository(url: uri("../testrepo"))
         }
     }
 }