Timers vibrated by the alarm vibration default and never ramped. Both are
now the timers' own app-wide settings, next to the default timer sound in
Settings > Timers: a Vibrate switch and the same Gradual volume picker
alarms use. Timer.resolveSettings reads them instead of the alarm default
and the old TimerRing.RAMP_SECONDS constant.
A fresh install starts with timer vibration off, as Google Clock does, and
no ramp. An existing install keeps what its timers did: a one-shot DataStore
migration writes the new key from the alarm vibration default before the
first read, so nobody's kitchen timer silently stops buzzing on update. A
fresh install is told apart by an empty store (anything that has run once
has written its boot id); the migration writes the default there too, so it
never runs twice.
Backups carry both new fields. A file without them restores the alarm
vibration default as the timers' (what that install's timers did) and a
flat ring.
Silent plus vibration off still signals: Silent gives the player no
sources, and its onSilenced callback starts the vibrator whatever the
setting says. The settings row says so.
Fixes#22
makiolaj
fbc3a192bf