Set MODULE_BUILD_FROM_SOURCE to true for GSI images am: e99b770777

Original change: https://googleplex-android-review.googlesource.com/c/device/generic/common/+/22830026

Change-Id: I41178becb6d53795a2cce586a88f5be80f694b7c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>