Protects MyTracks notifications based on the settings bit.

Only sends broadcast notifications if allowed by the settings bit.

Introduces a permission for internal MyTracks communication.
Thus the MyTracks app widget can use this permission to
always receive broadcast notifications when a track starts
and stops.

MyTracks/res/values/do_not_translate.xml

@@ -53,4 +53,8 @@ limitations under the License.
   <string name="start_new_track_action">com.google.android.apps.mytracks.START_NEW_TRACK</string>
   <string name="end_current_track_action">com.google.android.apps.mytracks.END_CURRENT_TRACK
           </string>
+  
+  <!--  Permissions -->
+  <!-- Permission for MyTracks notifications. -->
+  <string name="mytracks_notifications_permission">com.google.android.apps.mytracks.MYTRACKS_NOTIFICATIONS</string>
 </resources>

MyTracks/res/values/strings.xml

@@ -524,11 +524,14 @@ limitations under the License.
 
   <!-- Manifest description (not seen inside the app) -->
   <string name="notification_permission_label">receive MyTracks notifications</string>
+  <string name="mytracks_notifications_permission_label">receive MyTracks notifications</string>
   <string name="read_tracks_permission_label">read MyTracks data</string>
   <string name="write_tracks_permission_label">write data to MyTracks and start/stop MyTracks
           recording</string>
   <string name="notification_permission_description">Allows the application to receive notifications
           when MyTracks starts or stops a recording.</string>
+  <string name="mytracks_notifications_permission_description">receive MyTracks notifications
+          </string>
   <string name="read_tracks_permission_description">Allows the application to read MyTracks data.
           </string>
   <string name="write_tracks_permission_description">Allows the application to write data to