SystemUI: AntiFlickerTile: Catch NullPointerException

Log:
11-17 22:38:42.791 10389 10389 D AndroidRuntime: Shutting down VM
11-17 22:38:42.792 10389 10389 E AndroidRuntime: FATAL EXCEPTION: main
11-17 22:38:42.792 10389 10389 E AndroidRuntime: Process: com.android.systemui, PID: 10389
11-17 22:38:42.792 10389 10389 E AndroidRuntime: java.lang.NullPointerException: Parameter specified as non-null is null: method com.android.systemui.qs.QSHostAdapter.removeTile, parameter spec
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.systemui.qs.QSHostAdapter.removeTile(Unknown Source:3)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.systemui.qs.tiles.AntiFlickerTile.updateConfig(AntiFlickerTile.java:102)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.systemui.qs.tiles.AntiFlickerTile.<init>(AntiFlickerTile.java:78)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.systemui.qs.tiles.AntiFlickerTile_Factory.newInstance(AntiFlickerTile_Factory.java:87)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.systemui.qs.tiles.AntiFlickerTile_Factory.get(AntiFlickerTile_Factory.java:71)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.systemui.qs.tiles.AntiFlickerTile_Factory.get(AntiFlickerTile_Factory.java:19)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.systemui.qs.tileimpl.QSFactoryImpl.createTileInternal(QSFactoryImpl.java:86)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.systemui.qs.tileimpl.QSFactoryImpl.createTile(QSFactoryImpl.java:72)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.systemui.qs.QSTileHost.createTile(QSTileHost.java:507)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.systemui.qs.QSHostAdapter.createTile(QSHostAdapter.kt:188)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.systemui.qs.customize.TileQueryHelper.addCurrentAndStockTiles(TileQueryHelper.java:129)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.systemui.qs.customize.TileQueryHelper.queryTiles(TileQueryHelper.java:93)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.systemui.qs.customize.QSCustomizerController.show(QSCustomizerController.java:195)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.systemui.qs.QSPanelController.lambda$showEdit$1(QSPanelController.java:209)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.systemui.qs.QSPanelController.$r8$lambda$z8OMM37iiXb3ks0E-1yg4Ohx0EE(QSPanelController.java:0)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.systemui.qs.QSPanelController$$ExternalSyntheticLambda1.run(R8$$SyntheticClass:0)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at android.os.Handler.handleCallback(Handler.java:958)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at android.os.Handler.dispatchMessage(Handler.java:99)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at android.os.Looper.loopOnce(Looper.java:205)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at android.os.Looper.loop(Looper.java:294)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at android.app.ActivityThread.main(ActivityThread.java:8173)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at java.lang.reflect.Method.invoke(Native Method)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552)
11-17 22:38:42.792 10389 10389 E AndroidRuntime: 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:971)

Change-Id: Iabe86b02056745ed2babf66fb4ef7d708fd74d09