StkMenuActivity shall handle timeout exactly even in the low-power mode

The timeout handler does not work as expected if the terminal goes into
the low-power idle mode. StkDialogActivity does not have the same issue
because the scheduled alarm is used instead of the handler with the
delayed message. The same solution shall be applied to StkMenuActivity.

Bug: 31297948
Test: Confirmed the expected behaviors in manual test cases.

Change-Id: I134404fa9fcf2a37394aaef74bf344ff4aeae182
1 file changed