Fix theme of BrightnessDialog

Parent inheritance overrides dot inheritance. In order to have a dialog
theme but also get QS colors, apply the theme (as fallback) for the
dialog.

Test: manual, open dialog from Settings
Fixes: 289187620
Change-Id: Idf36d91005a50b95e502e8a208daf254aeaf4fb8

packages/SystemUI/AndroidManifest.xml

@@ -865,7 +865,7 @@
         <activity
             android:name=".settings.brightness.BrightnessDialog"
             android:label="@string/quick_settings_brightness_dialog_title"
-            android:theme="@style/Theme.SystemUI.QuickSettings.BrightnessDialog"
+            android:theme="@style/BrightnessDialog"
             android:finishOnCloseSystemDialogs="true"
             android:launchMode="singleInstance"
             android:excludeFromRecents="true"

packages/SystemUI/res/values/styles.xml

@@ -398,7 +398,8 @@
         <item name="android:itemTextAppearance">@style/Control.MenuItem</item>
     </style>
 
-    <style name="Theme.SystemUI.QuickSettings.BrightnessDialog" parent="@android:style/Theme.DeviceDefault.Dialog">
+    <!-- Cannot double inherit. Use Theme.SystemUI.QuickSettings in code to match -->
+    <style name="BrightnessDialog" parent="@android:style/Theme.DeviceDefault.Dialog">
         <item name="android:windowBackground">@android:color/transparent</item>
     </style>
 

packages/SystemUI/src/com/android/systemui/settings/brightness/BrightnessDialog.java

@@ -84,6 +84,7 @@ public class BrightnessDialog extends Activity {
         window.getDecorView();
         window.setLayout(
                 WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.WRAP_CONTENT);
+        getTheme().applyStyle(R.style.Theme_SystemUI_QuickSettings, false);
 
         setContentView(R.layout.brightness_mirror_container);
         FrameLayout frame = findViewById(R.id.brightness_mirror_container);