Change mODICaptionsTooltipView null check occasion to avoid potential crash

Null check before a runnable can not guarantee a non-null
mODICaptionsTooltipView when it starts running. This CL switched the
null check occasion to fix it.

Fixes: 266980616
Test: manual, atest
Change-Id: I3c83e775a7fd278dc255242518412ba790625fdb
1 file changed