Correct the cutout of external displays

Also correct the rounded corners.

Test: atest LogicalDisplayTest
Test: Present on an external display and observe (see bug)
Fix: 273995115
Change-Id: Ia01f8100ccff398194de9cc53a4edf31b7e74bf8
(cherry picked from commit d4a3e12c735dc63ddb11716c0af0dda5e63d8902)
Merged-In: Ia01f8100ccff398194de9cc53a4edf31b7e74bf8
2 files changed