Remove SwiftShader from Trout am: 7c8f232deb

Original change: https://android-review.googlesource.com/c/device/google/trout/+/2154182

Change-Id: I1897957d511951c39e7e0fe562e41cd5851af032
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>