Build vendor_boot image for microdroid

It consists of

* common kernel modules for virtual devices
* a dummy dtb image

Bug: 178978059
Test: m microdroid_vendor_boot-5.10

Change-Id: I7df34ef976b557ff750aa566838f744162caf1a3
2 files changed
tree: cf9ccf867ffd8fdba05700af91a0c67d3b099fe4
  1. apex/
  2. authfs/
  3. docs/
  4. microdroid/
  5. tests/
  6. .clang-format
  7. PREUPLOAD.cfg