Need break to stop unexpected fall through

STATE_LF should finish without processing next case but unexpected fall
through happens due to missing of "break".

Fortunately, this unexpected fall through doesn't cause any problems
since STATE_ODD_NUMBERED_RIS case always finishes without doing anything
when unexpected fall through happens.

Bug: 29491345
Change-Id: I23c673ccfc4a2c786fa41f0f7bacb0885896a509