SystemUI: Add less boring heads up option [SQUASHED]

Q: don't skip the new Bubbles (the circular popping up notifications
like the Dialer one when a call is active and you press the home button)
Reference: https://github.com/ezio84/abc_frameworks_base/commit/c3d6f7d386286a4e55a3e0644782827705db7168#diff-c38ee79f64d8dc57e7757863d741be46



Allow to show heads up only for dialer and messaging
app when they are not in foreground

neobuddy89:
* Added clock app too in whitelist.
* Adapted and squashed for A12.

Stallix:
* Adapted logging for A13.

Squashed:

    From: Pranav Vashi <neobuddy89@gmail.com>
    Date: Wed, 14 Dec 2022 08:22:21 +0530
    Subject: Slightly optimize less boring apps check for heads up

    * We do not want to keep checking packages everytime
      when this option is disabled or device is dozing.

    From: minaripenguin <minaripenguin@users.noreply.github.com>
    Date: Thu, 9 Mar 2023 12:06:30 +0800
    Subject: Less boring heads up: Don't skip heads up for most messaging apps

    From: Rushab Shah <rushabshah32@gmail.com>
    Date: Sun, 30 Apr 2023 00:22:42 +0530
    Subject: LessBoring: fixup LessBoring preventing bubbles

    From: minaripenguin <minaripenguin@users.noreply.github.com>
    Date: Tue, 26 Sep 2023 11:40:59 +0800
    Subject: SystemUI: Less boring headsup enhancements and fixes

    * cleanup methods and use AOSP's headsup observer

    test: call/messaging while toggling reticker/less boring headsup feature on/off

    attempt to fix: whitelisted notification apps skipped when using reticker/less boring headsup feature

Change-Id: I26ecd6ca36db09ee662210b386c031f90016ddc4
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>