Handle navigation back problem from About Phone

Removed the android:parentActivityName attribute in .Settings$MyDeviceInfoActivity.

Fixes: 128941539
Test: manual test & view
Change-Id: Id5929bd8bcd8b136610fff76e406f62b2ffef8c2
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 92a1066..831846e 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -901,8 +901,7 @@
 
         <activity android:name=".Settings$MyDeviceInfoActivity"
                   android:label="@string/about_settings"
-                  android:icon="@drawable/ic_homepage_about"
-                  android:parentActivityName="Settings">
+                  android:icon="@drawable/ic_homepage_about">
             <intent-filter android:priority="1">
                 <action android:name="android.settings.DEVICE_INFO_SETTINGS" />
                 <action android:name="android.settings.DEVICE_NAME" />