Merge "Move power button cooldown period flag to Settings.Global" into sc-v2-dev am: e8d0b6bd

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16762503

Change-Id: Ic19276e9fdc44c567f0e9e488e7e0a1c1fec0ebb