Merge "Log various types of back gesture using StatsLog Bug: 135152789 Test: m statsd_testdrive -j31 Test: out/host/linux-x86/bin/statsd_testdrive 224" into qt-r1-dev am: fa38ed5296 am: 2984f34075
am: e2a5cc4e4a

Change-Id: Id05afc2ba9a770285bc20a6488c72dcf03b4c074