Bug 986406 - Don't skip entire reftest directories on Android.  r=roc
Bug 986409 - Skip fewer entire reftest directories on B2G.  r=roc
Bug 986807 patch 1 - Sync lower-risk prefs over from desktop reftest code to Android reftest code.  r=roc
Bug 986807 patch 2 - Sync APZC/viewport prefs from bug 975931 from desktop reftest code to Android/B2G reftest code.  r=roc