Remove unnecessary permission for output switcher panel

-Make this as a generic panel
-Add CTS to make sure this panel works on all Android devices

Bug: 151272095
Test: make -j50 RunSettingsRoboTests
Change-Id: Ie4fe277144a586eaf902dc5b700027153b1c86ab

AndroidManifest.xml

@@ -3196,7 +3196,6 @@
         <activity-alias
             android:name="MediaOutputSlice"
             android:label="@string/media_output_panel_title"
-            android:permission="android.permission.BLUETOOTH_PRIVILEGED"
             android:targetActivity=".panel.SettingsPanelActivity">
                 <intent-filter>
                     <action android:name="com.android.settings.panel.action.MEDIA_OUTPUT" />