Rename public OTA policy APIs in DevicePolicyManager

Use the term "SystemUpdate" instead of "OTA", in public
DevicePolicyManager APIs that handle OTA policies.

Bug: 19650524
Change-Id: Iebdaea91337d617147cb411b6f47e0f3fae8671c
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index ec57eba..fca5eda 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -311,7 +311,7 @@
     <protected-broadcast android:name="android.internal.policy.action.BURN_IN_PROTECTION" />
     <protected-broadcast android:name="android.service.persistentdata.action.WIPE_IF_ALLOWED" />
 
-    <protected-broadcast android:name="android.app.action.OTA_POLICY_CHANGED" />
+    <protected-broadcast android:name="android.app.action.SYSTEM_UPDATE_POLICY_CHANGED" />
     <!-- ====================================================================== -->
     <!--                          RUNTIME PERMISSIONS                           -->
     <!-- ====================================================================== -->