Squashed import of adb root patches

Author: Luca Stefani <luca.stefani.ge1@gmail.com>
Date:   Sat Nov 2 22:46:51 2019 +0100

    Expose the ADBRoot interface to priv-apps

    Change-Id: I493f3322b19b6474bf8899a103156794ef412ae2

Author: Luca Stefani <luca.stefani.ge1@gmail.com>
Date:   Sun Nov 3 12:17:17 2019 +0100

    Whitelist settings to use adb root permission

    Change-Id: I93122777c82fad33be04fcce002ba1a8468cacbe

Author: Michael Bestas <mkbestas@lineageos.org>
Date:   Sun Nov 17 14:31:04 2019 +0200

    Fix ADB root system API extension

    * Fixes checkapi:
      out/soong/.intermediates/frameworks/base/system-api-stubs-docs/android_common/current-apicheck/srcjars/android/Manifest.java:3435:
      error: Added field android.Manifest.permission.ADBROOT to the system API [AddedField]

      error: Added package android.adb to the system API [AddedPackage]

    Change-Id: Idd509c31d961a0b20fac8cccd2c83c6bf23c5a38

Author: dianlujitao <dianlujitao@lineageos.org>
Date:   Sat Nov 23 21:52:19 2019 +0800

    ADBRootService: Deal with binder death

    Change-Id: Id5e4a455ea16a4158086816abf093d8f603d4e49

Author: dianlujitao <dianlujitao@lineageos.org>
Date:   Fri Nov 22 20:12:33 2019 +0800

    ADBRootService: Remove redundant permission check

     * First of all, the check is performed in a helper class, one can
       easily bypass it by directly issuing the binder API.
     * On the other hand, enforceCallingOrSelfPermission allows root and
       system UID to do everything, i.e., any process running in system UID
       is allowed to pass the check, including Settings app, thus it's
       simply a no-op.

    Change-Id: I82f58d6165c2ef35c61047d5899de3e8ca6f7f39

[LuK1337]: Rework for Android 11.

Change-Id: I320bc39573ddd81759893e442e02c7c580323d39