Revert regressions introduced by QRD update.

- Fix aapt warnings due to needless string renaming
- Remove totally pointless confirmation dialogs on app exit
- Remove 'Press record' texts - it should be obvious that one needs to
  press record to record, and the text displayed if the device supports
  surround recording was plain confusing.

Change-Id: Idfa6484d6fff248ec3d98c7b50f31d4f42fad250