Frameworks: QS Swipe to Switch
Based on code from AOKP

Swipe left or right across the notification panel to switch between
notifications and Quick Settings.
I have removed the settings toggle making this feature always active.

Original commit:
https://github.com/AOKP/frameworks_base/commit/1d77aa27c227f15af57e7e7c9fb9343c424f3ec9#diff-861aa855219bd25761dc6f44dfb97937R1708

Change-Id: I5a6eff454b2d9527b86c8cf8bcc0baf79376339a