Remove @removed trySetQuietModeEnabled

Context:
Updated the API according to API council feedback. Marked it as
@Removed and keep it for a while for Launcher. But now Launcher
prebuilt is updated, we are safe to remove it.

Test: Build

BUG: 71818127

Change-Id: I33fec12addf7031bfbcd86bce9e636c31d0ea4d3