SystemUI: Add powershare QS tile

Author: Linux4 <tim@linux4.de>
Date:   Mon Apr 20 17:57:43 2020 +0200

    base: SystemUI: add qs powershare tile

    Change-Id: Ibcf5cc3e766d971d9dca9242bf2770093d4d3099

Author: Linux4 <tim@linux4.de>
Date:   Sat May 2 12:54:49 2020 +0200

    base: SystemUI: fix NPE in PowerShareTile

    Change-Id: If69846f3e3d4f3a12c0f78f47b5adc1008888de1

Author: LuK1337 <priv.luk@gmail.com>
Date:   Tue Jul 7 13:27:12 2020 +0200

    SystemUI: Call setOnlyAlertOnce(true) for PowerShare notification

    * Otherwise we end up getting notification sound
      every 20 seconds when using it...

    Change-Id: Ia56b01f332860b64f0d2c532884e6bcaa2acfb17

Change-Id: Ia09a674745adb433f3aaeebfeb79899906350793