notifications: Add phone alarm support with dismiss/snooze

[vkareh]

Map HighPrioritizedAlert category to a new PhoneAlarm notification type that shows dismiss and snooze buttons and rings until the user interacts or times out.

Watch sends 2-byte BLE responses back to the phone to dismiss or snooze the alarm.

This allows the user to set alarms on the normal phone clock, and have it ring on the watch:

Companion: https://codeberg.org/Freeyourgadget/Gadgetbridge/pulls/5913

[github-actions]

Build size and comparison to main:

Section	Size	Difference
text	385640B	408B
data	944B	0B
bss	22640B	0B

Run in InfiniEmu

[Eve1374]

Hi, I've been using it for more than a week and it has been working good and is very useful (until gadget bridge auto updated back to its main version ;) )
However I had in mind that the main version of Infinitime was displaying the alarm's text on the notification, but now I can't find it back even when switching back to main; did I dream ? I would find it quite useful to have the alarm's text displayed instead of "phone alarm", but don't have the time to dig into it now.