Revert "Refine documentation for Process.setThreadPriority"

This reverts commit c3648a82f108d95fe61174e468085826e9f6a2af.

Reason for revert: will cause lock contention

Bug: 139521784
Test: build pass
Change-Id: Ic10951493ec8dda4e5a5adcbd1c3cb3be3b64782
1 file changed