Fix crash when starting daydream setting with wrong context

The context must be a UI context. This is a new requirement in P.

Change-Id: I3e2de5068f44010da7d57af030e9f029dd97a7f8
Merged-In: I28874f296da617f4cedf6706b0663b76671f1780
Fixes: 111375261
Fixes: 113312592
Test: robotests
diff --git a/src/com/android/settings/dream/CurrentDreamPreferenceController.java b/src/com/android/settings/dream/CurrentDreamPreferenceController.java
index 86143dd..e053760 100644
--- a/src/com/android/settings/dream/CurrentDreamPreferenceController.java
+++ b/src/com/android/settings/dream/CurrentDreamPreferenceController.java
@@ -69,7 +69,7 @@
     private void launchScreenSaverSettings() {
         Optional<DreamInfo> info = getActiveDreamInfo();
         if (!info.isPresent()) return;
-        mBackend.launchSettings(info.get());
+        mBackend.launchSettings(mContext, info.get());
     }
 
     private Optional<DreamInfo> getActiveDreamInfo() {