frameworks: Add tunable for GlobalActions configuration

Before, the power menu may have not updated when switching users. With tunables, we can be sure each user will only see their own settings.

Remove the ACTION_UPDATE_POWER_MENU broadcast as well.

Signed-off-by: Gegham Zakaryan <zakaryan.2004@outlook.com>
Change-Id: I1d7dbe1eac41a83910c9c6db28162212971b42fb