rename unified email's package name to com.android.mail

New code needs a new package name. Fixes IDE conflicts when
browsing.

Change-Id: I328484c6d6c71df077a05d2f7d6d1e85074107c2
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 0eb4a6d..3aadc3b 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -15,7 +15,7 @@
      limitations under the License.
 -->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.android.email"
+    package="com.android.mail"
     android:versionCode="1"
     android:versionName="1.0" >
 
@@ -70,7 +70,7 @@
 
         <receiver android:name=".providers.protos.gmail.GmailIntentReceiver">
           <intent-filter>
-            <action android:name="com.android.email.providers.protos.gmail.intent.ACTION_PROVIDER_CREATED" />
+            <action android:name="com.android.mail.providers.protos.gmail.intent.ACTION_PROVIDER_CREATED" />
           </intent-filter>
         </receiver>