target Android 14

[sds100]

Developer TODO (don't remove)

• [x] create new branch. put issue number at start of name
• [x] Check that all actions using (pending) intents still work
• [x] Upgrade to SDK 34 and use API to get version number in KeyMapperImeMessenger.
• [x] Use ContextCompat for registering receivers.
• [x] Do Quick Settings Tiles still work?
• [x] Does inputting key events work?
• [x] update documentation
• [x] merge and delete branch (don't squash because want commit history to see why I made changes)