[Safer intents] Settings misc

To avoid implicit intents, make intents launch explicitly.

Test: build
Bug: 323061508
Change-Id: Ie19cbceb89842a75a180898abcce81b63c18d46c

src/com/android/settings/BrightnessPreference.java

@@ -31,7 +31,8 @@ public class BrightnessPreference extends Preference {
 
     @Override
     protected void onClick() {
-        getContext().startActivityAsUser(new Intent(Intent.ACTION_SHOW_BRIGHTNESS_DIALOG),
+        getContext().startActivityAsUser(new Intent(Intent.ACTION_SHOW_BRIGHTNESS_DIALOG)
+                        .setPackage(Utils.SYSTEMUI_PACKAGE_NAME),
                 UserHandle.CURRENT_OR_SELF);
     }
 }