Persist screenrecord show taps setting across reboot

Screen recording allows users to turn on the 'show taps' setting for the
duration of the recording, and then restores the original setting.
However, if the phone is rebooted during recording, the process is never
cleaned up and the 'show taps' setting is never reset. This change
stores the original setting and whether it should be updated when a
recording is started, and adds a CoreStartable to check that setting and
update the 'show taps' setting if necessary to restore the pre-recording
state.

Bug: 431753924
Test: manual
Flag: com.android.systemui.restore_show_taps_setting
Change-Id: I0a66324843f6eda220450575294ffa389fd7acfb