Using ParceledListSlice for {get|set}AppStandbyBuckets

UsageStats.getAppStandbyBuckets and setAppStandbyBuckets deal with large
maps of packages to buckets which may exceed the IPC transaction size
limit. Using ParceledListSlice to send and receive data across binder.

Test: atest android.app.usage.cts.UsageStatsTest#testGetAppStandbyBuckets
And manually:
adb shell am get-standby-bucket --user 0
adb shell am set-standby-bucket <package1> active <package2> rare ...
Locally, added protectionLevel development to permission
CHANGE_APP_IDLE_STATE and tested setAppStandbyBuckets with a test app.

Bug: 70890569
Change-Id: Ic1fb0465137d1b830d3ad1fbf3ac8698a409c623