Widget: fix QuickAdd keyboard-focus race, force widget re-render on save

QuickAddActivity's autofocus used delay(150) then requestFocus() +
keyboard.show() -- a fixed delay racing against the window actually
gaining focus. This is a translucent, separate-taskAffinity popup
activity, so window focus transfer is variable/device-dependent; a
show() call made before the window is focused is silently dropped by
the IME service, no error, no retry -- the classic cause of "keyboard
doesn't appear until I tap out and back in" (reported 2026-08-06, "more
consistent here" than the same general Android quirk elsewhere). Fixed
to react to LocalWindowInfo.isWindowFocused instead of guessing a
timing window, plus windowSoftInputMode="adjustResize|stateVisible" as
an OS-level second line of defense.

Tried to verify live and hit a real limitation worth recording: this
box's AVDs run -no-window (headless), and in that mode mInputShown
never reports true via dumpsys input_method even for a manual,
deliberate tap on the field -- confirmed by testing a plain tap
directly, independent of any app code. The harness can't observe IME
visibility here, so this fix is verified by code-level reasoning
(LocalWindowInfo-driven focus is the standard, documented fix for this
exact bug class) and confirmed window-focus DOES transfers correctly
(mServedView moves to the bottom sheet's window), not by watching the
keyboard actually appear. Real confirmation has to happen on-device.

Also: SettingsActivity.saveAndFinish() only ever called
DootWidget().updateAll() indirectly, as a side effect of RefreshWorker
succeeding its network fetch -- so a slow or failing request could
delay or block the widget from reflecting a setting the user just
saved, even though every setting saved there (theme, text size,
background, checkboxes) is already fully local and needs no network
round trip to take effect. Now calls updateAll() directly and
immediately after writing prefs; RefreshWorker still runs afterward to
separately pull fresh server data.

Verified installable and crash-free on a real API 36 emulator.
Deployed as doot-widget.apk.

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