uploading .raw recognition audio files as datum audio

for https://github.com/OpenSourceFieldlinguistics/FieldDB/issues/1600 and https://github.com/batumi/KartuliSpeechRecognition/issues/17 and https://github.com/OpenSourceFieldlinguistics/AudioWebService/pull/1
Merge branch 'master' into speechrecognition
not using captions
for #10 #11 #12 offering only supported language models (not pocketsphinx demos)
using the sms corpus language model by default

and making first character of the result uppercase so it looks nicer (the sms corpus is all uppercase)
debug mode off for deployment
Adding more activities to the welcome page
v2.18 deployed
using bouncy castle v146 fixes https://github.com/batumi/KartuliSpeechRecognition/issues/23
explaining SDCARD is not found so cant load voice model
adding prefer external as apk is now 11.7MB (was 1.9MB)

for https://github.com/batumi/KartuliSpeechRecognition/issues/24 and https://github.com/batumi/KartuliSpeechRecognition/issues/25 and
fixes https://github.com/batumi/KartuliSpeechRecognition/issues/26