Revert "SurfaceFlinger: more aggressive infrequent layer detection"

This reverts commit 1adbb727.

Reason for revert: Causing regression with b/157096772

Change-Id: Ib2009f7a4ecbd268ea69304853a91bd22674ec1e
Test: Play 24fps video in YouTube PIP mode and rotate the device - no jank
Test: Chrome playing video - no refresh rate switching
Test: Hide/Show keyboard when inputting text
Test: Running Hay Day and observing refresh rate
Bug: 157096772
Bug: 155062712
Bug: 156654519