Disable worker contexts on Android emulator Bug: chromium:1184692 Change-Id: I1b15e24d0cddd287f32ecb7f28568658f16b776d Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2735375 Commit-Queue: Peng Huang <penghuang@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>