Revert split bucket app upgrade default to true

On s-based branches, the default should be true.

Bug: 199806881
Test: TH
Merged-In: Id9eeb9ccdca176c408abec715cef8a34b496c8b2
Change-Id: I4801a42f26e6922513981f5ac114bf3bbbfa208e
1 file changed