Revert "Remove double tap, make long press to enable torch [1/2]"

Several people liked double tap better.

This reverts commit 8529d5316c0250ea9e52305f2a75fbad72e7a17f.

Change-Id: Id2daa39c8b25b2f6b4ddf52f2ba8ef5b8d71de1c
Merge commit 'refs/changes/37/1837/1' of https://review.carbonrom.org/CarbonDev/android_frameworks_base into overscroll
Merge branch 'overscroll' of https://github.com/GzRoms-Redux/android_frameworks_base into overscroll