Zom Android 15.4 beta 3

464162e update build to 1540013
d35e1e5 fix display issues with thumbnail on convo list
525d341 for #415 update sticker ordering
8ddd94a for #428, change our XMPP resource to just "Zom"
5f459ff for #421 update expression stickers
4da15ff add losar stickers #422 and fix sticker display code
fd5df39 don't auto open chat with new contacts
4c2cada possible fix for #424 don't ever set the URI for the text message display
50eb3a4 update hardware optional req's for support of chromebooks
010754f for #400 resend of audio files now works
e988d31 notification and bg improvements
ea17be7 fix for #387 don't crash when deleting photos
12fbfdf update build tools
b903544 update tibetan strings for chatbot
68859e2 update strings with xliff fixes
2455abd add zombots for Chinese
76d57b2 update strings xliff tags
20f3173 disable memorizing trust manager
6a1f29b update zomstrings to add bot strings in