Sign microdroid_boot and _vendor_boot

usb_avb is now turned on.

Bug: 180676957
Test: m microdroid_boot-5.10 microdroid_vendor_boot-5.10
Check the built image via `avbtool info_image --image <built_image>`

Change-Id: I8758338a078a920566ee4fb9ab6fa37900cde3c3
1 file changed
tree: a1d2805972c3e757710d448779464aa8f0bda812
  1. apex/
  2. authfs/
  3. docs/
  4. microdroid/
  5. tests/
  6. virtmanager/
  7. vm/
  8. .clang-format
  9. PREUPLOAD.cfg