Don't throw, only log when collecting is not collecting

There's apparently a super rare situation where the
controller's mCollecting transition is somehow not in
collecting mode. Remove this exception and instead add
some logging in getCollectingTransition() to hopefully
detect earlier when this mismatch might occur.

Bug: 355384206
Flag: EXEMPT bugfix
Test: N/A
Change-Id: Icc8a09e37b6da8b54efcffef51ed96a000c562cc