Bug 970076 - Set preferred video colour format for OMX on Android 4.2 and 4.3. r=doublec, a=sledru

Android 4.2 introduced some relatively major changes in the way that Android
negotiates its output colour format. This was fixed on 4.4 KitKat in bug 953394.
This patch just lets Android versions 4.2 and 4.3 use the same fix.
Bug 969382. r=jorendorff, a=abillings
Bug 975773 - Filter primitives in error states can have inputs. r=roc, a=sledru
Bug 942024 - Yahoo search not using custom search codes. r=mbrubeck, a=sledru
Bug 951465 - Update Google/Yahoo/Wikipedia icons to have better icon sizes. r=mbrubeck, a=sledru
Merge mozilla-beta to b2g28. a=merge