ANDROID: cuttlefish_defconfig: Enable EAS related defines

Provides build coverage for features coming from eas-dev. For now, make
this specific to the arm64 defconfig.

Bug: 118439987
Bug: 120439617
Test: make ARCH=arm64 cuttlefish_defconfig && make ARCH=arm64
Change-Id: Id018290a2d38631b4b88f15ee7a1a85fcce25798
Signed-off-by: Alistair Strachan <astrachan@google.com>