Revert "Give up on busy DB after a while"

This reverts commit 115c4722f817abd904a017eecec2fc9eef4c9165.

Reason for revert: It turns out that some apparently-hung transactions
can eventually progress, after a longer period than the timeout used
here, so remove this behaviour.

Test: keystore2_tests
Bug: 319563050
Bug: 315165314
Bug: 346653802
Change-Id: Iabdff493c063d9afc31f34d47bf5e60202aa5700
1 file changed