Allow com.android.settings to have CONTROL_UI_TRACING (2nd try)

This CL allows

  com.android.settings

to have a "signature|privileged" permission

  android.permission.CONTROL_UI_TRACING

permission.  This permission will be used for QS DevelopmentTiles to
continue being allowed to access WM/IME tracing IPCs.

Bug: 172444310
Test: cf_x86_64_phone-userdebug still boots up
Test: cf_x86_64_auto-userdebug still boots up
Change-Id: I9aa69247f02447f2454e42e3625f0ed764991edf