Change all resid switches to if-elseif-else

I really want to get this building in an IDE.

As per http://tools.android.com/tips/non-constant-fields, library
projects (like UnifiedEmail will be) have non-final R constants. They
are not final until packaged into the main application project's
(Gmail/Email)'s R.java.

As such, they cannot be used in switch case statements, and we must
use if-elseif-elseif-elseif-...-else instead.

"This is typically in UI code and the performance impact is
negligible."

Change-Id: Ie699c13e1becd51c59c1b2ea81bc902d4f2e28d9
22 files changed