Revert "PixelCopyTest: More modification to the edge detection area."

This reverts commit fbe394c281cfc34e356bb61f22d914c7702f12cf.

Reason for revert: Broke other device's test result (b/150839078)

Bug: 150839078
Change-Id: Iabb5dcc8920a479fff6f54c951958e45effda80e
Test: android.view.cts.PixelCopyTest
1 file changed