Add HANDLE_CAR_MODE_CHANGED permission

Required to allow DeviceStateMonitor to monitor changes in car mode to
get an accurate state of when all screens are on/off.

Test: build
Bug: 160898432
Change-Id: I36f39452b3f9627e44546c6ef79464785f4f23f5
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 425440a..45642bb 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -215,6 +215,7 @@
          from the background.  -->
     <uses-permission android:name="android.permission.START_ACTIVITIES_FROM_BACKGROUND" />
     <uses-permission android:name="android.permission.NETWORK_STATS_PROVIDER" />
+    <uses-permission android:name="android.permission.HANDLE_CAR_MODE_CHANGES"/>
 
     <application android:name="PhoneApp"
             android:persistent="true"