Add an option in the InCall UI to perform call recording

Change-Id: Icc86a0a7ae9d2493a837d02f321df7cb1387cded

Conflicts:
	res/values/dimens.xml
Fix display of 'Dialing (waiting...)' state.

Change-Id: I8a659823dd61d452641c4ddb0f3141304b86d613
Fix NPE in dock mode.

Add the call recording button also to the landscape layout. Also
properly add (and hide) button spacers.

Change-Id: Idc4c7669a78a7445a421bc28bd527f6d423f5c6a