Remove duplicate input switching

Multiple input switching happened at the same time will confuse Live
Channels and make the input banner view showing no text or disappear in
a short time period.

Test: manual
Bug: 127378724
Change-Id: Ibcc8635a296801d40d69cab6cccbe90355229b98
(cherry picked from commit 53acc3416fc19bacd8f736cdbe7155ff01a26651)