Clean up samples (gradle files and Compat stuff in wearable code).

- Remove -v13 and -v4 dependencies on wearable side
- Verify phone is set to compile on API 19 and wearable on 20
- Replace NotificationCompat in wearable side since it uses API 20
- Move ElizaChat code to Application directory

Bug: 15809453
Change-Id: Ib75e7894505f82e5b4d8591b4dfa91a3de8e0329

samples/wearable/GridViewPager/Wearable/build.gradle

@@ -20,6 +20,5 @@ android {
 }
 
 dependencies {
-    compile "com.android.support:support-v13:20.0.+"
     compile "com.google.android.support:wearable:1.0.+"
 }

samples/wearable/GridViewPager/Wearable/src/main/AndroidManifest.xml

@@ -1,12 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.example.android.wearable.gridviewpager"
-    android:versionCode="1"
-    android:versionName="1.0" >
-
-    <uses-sdk
-        android:minSdkVersion="20"
-        android:targetSdkVersion="20" />
+    package="com.example.android.wearable.gridviewpager" >
 
     <application
         android:allowBackup="true"