Call new API setTemporaryAppAllowlist() and specify temp-allowlist reasonCode.

Deprecate/delete setTemporaryAppWhitelistDuration(int type, long duration) which is also a new API added very recently.

Bug: 171305836
Test: atest cts/tests/app/src/android/app/cts/ActivityManagerFgsBgStartTest.java
Reboot device, observe "tempAllowListReason" in logcat.

Change-Id: I29181ce224c28277db1d45ec7fd0f79e032e5c90
BYPASS_INCLUSIVE_LANGUAGE_REASON=existing public API