Load max shutdown processing from resource

- add maxGarageModeRunningDurationInSecs: Most shutdown processing time
  is time for garage mode.
- This should be equal or greater than 15 min (=900 secs). Smaller value will
  be ignored and 15 mins will be used instead.
- This allows entering into STR without forcing android to shutdown.

Bug: 128888292
Test: Enter STR and check timeout.
Change-Id: Id0e18128f2dd51c796da4fa73a12dab94c126b34
2 files changed