Do not trigger Gradle sync automatically

Triggering sync should remain under control of the user. If in some
circumstances build cannot proceed without syncing it will report this
to the user.

This code adds unnecessary complexity to the `GradleSyncInvoker`, which
is not used anywhere else.

Bug: 228441874
Test: n/a
Change-Id: I393c4d1f3c42a8741f2d9092151e0bd25ab57f4a
1 file changed