Enable 2 legacy serial ports for microdroid am: c95baf1065

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2110865

Change-Id: Iee1e7dcbd3c275c51c421a2034de55e0701b39a9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>