[Android] BackgroundTaskScheduler reschedule implementation

chrome/android/java/AndroidManifest.xml

Index: chrome/android/java/AndroidManifest.xml
diff --git a/chrome/android/java/AndroidManifest.xml b/chrome/android/java/AndroidManifest.xml
index 46c4a51a86ea4ecc28b24cc664499a6f793f102d..04ac024a0795c9b6c1dc17b97e04e4fd2c1d741c 100644
--- a/chrome/android/java/AndroidManifest.xml
+++ b/chrome/android/java/AndroidManifest.xml
@@ -802,6 +802,15 @@ by a child template that "extends" this file.
             android:exported="false"
             android:permission="android.permission.BIND_JOB_SERVICE"/>
 
+        <!-- Background Task Scheduler GCM task service -->
+        <service android:name="org.chromium.components.background_task_scheduler.BackgroundTaskGcmTaskService"
+            android:permission="com.google.android.gms.permission.BIND_NETWORK_TASK_SERVICE"
+            android:exported="true">

[nyquist, 2017/04/18 22:33:02]

Are there any security measures we should take with this since it's exported?
Can we verify the bind is from Google Play services?

[fgorski, 2017/04/20 19:09:58]

I am not sure how that would be done. This was taken straight from the
ChromeBackgroundService... I don't know that there is any check there either.

Let's sync about that.

+            <intent-filter>
+                <action android:name="com.google.android.gms.gcm.ACTION_TASK_READY" />
+            </intent-filter>
+        </service>
+
         <!-- GcmTaskService implementation to wake Chrome on scheduled events -->
         <service android:name="org.chromium.chrome.browser.ChromeBackgroundService"
             android:permission="com.google.android.gms.permission.BIND_NETWORK_TASK_SERVICE"