Stop fearmongering about encryption

While standard TLS encryption is not E2E, it is hardly "unencrypted" and so we
should not be scaring people quite so strongly about it.

Merge remote-tracking branch 'upstream/master'

* upstream/master: (27 commits)
  show 'using account …' in incoming call screen
  show contact jid in call screen
  bump copyright year
  Add handling of status code 333
  increase default pw length
  do not build emoji flavors
  pulled translations from transifex
  add changelog
  fix ice candidate sending when different credentials are used
  remove security check that ensures rtp connection was properly finished
  code clean up
  bump agp
  store encrypted pgp files in private cache dir
  do not restart wakelock if activity is finishing
  delete pre lolipop weOwnFile()
  use try with resources. remove unused methods
  rename version suffix to playstore/free
  bump appcompat, migrate to emoji2 and get rid of emoji flavor
  fix rare npe
  store recordings and documents in their respective folders
  ...

pulled translations from transifex

Merge remote-tracking branch 'singpolyma/dtmf' into integration2

* singpolyma/dtmf: (145 commits)
  Detect a video call in a consistent way
  Use a boolean for this state
  Switch onClicks to use DataBinding
  Polyfill to allow use on Android 21
  RtpSessionActivity: Fix NPE from using incorrect view id
  Changed dialpad icon to something more recognizable.
  Cleaned up DTMF code and click handling.
  WIP - dialpad and dtmf sending
  flush stanzas in batches
  code clean up in TagWriter
  Fix #4249.
  Clarify build instructions.
  allow verification of own omemo keys via uri
  bump dependencies
  version bump to 2.10.3-beta
  fix precondition for timeout handling
  bump agp version
  pulled translations from transifex
  add Samsung S4 to hardware aec blacklist
  add additional logging to image compression
  ...

pulled translations from transifex

pulled translations from transifex

pulled translations from transifex

pulled translations from transifex

moved translations into new resource on transifex

the 'strings' resource on transifex was in the internal 'Android 1' format
instead of the more modern 'Android 2' format.

This according to transifex support caused some weird issues…

The only work around (apparently) was to create a new resource (now call
main-strings) and use that instead.

I hope we didn’t mess anything up in the process.

Let's be extra careful with the next release

pulled translations from transifex

pulled translations from transifex

pulled translations from transifex

pulled translations from transifex

pulled translations from transifex

pulled translations from transifex

rename 'add to favorites' to 'pin to top'

pulled translations from transifex

pulled translations from transifex

pulled translations from transifex

pulled translations from transifex