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: bb3a5af71a

Change-Id: Id5de9535d1f2ae7afbb028e20e96daaace28a4a8