Add toggleable attribute to manifest for run trace quick settings tile.

Added meta-data element to QsService element in the AndroidManifest
enabling the toggleable option for the run trace quick settings tile.

Bug: 215250733

Test: Manual. Prior to change the run trace quick settings tile
contained a > after the change the > is no longer there.  Tapping the run
trace button still starts and stops a trace with share trace popup still
showing when a trace is complete. Long pressing the run trace button
still opens the Traceur app.

Change-Id: Ia0f95535761d9a0453204a71ea2943eae2e011ab

diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 2a1fca6..4a6d64d 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml

@@ -134,6 +134,8 @@
             <intent-filter>
                 <action android:name="android.service.quicksettings.action.QS_TILE"/>
             </intent-filter>
+            <meta-data android:name="android.service.quicksettings.TOGGLEABLE_TILE"
+                       android:value="true" />
         </service>
 
         <provider android:name="androidx.core.content.FileProvider"