Add a command-line option to change the boot slot.

If no slot is specified, it is hardcoded to "_a". This will be removed
when Cuttlefish has true A/B support and can read the correct slot from
the misc partition.

Bug: 140527427
Test: launch_cvd -boot_slot
Change-Id: I6c76fbdbd46d342c35e246e44a98222488e0e901
3 files changed
tree: 4d82012840173e9d49c6ad7b81e5dce3344d4647
  1. common/
  2. guest/
  3. host/
  4. tests/
  5. tools/
  6. Android.bp
  7. Android.mk
  8. OWNERS
  9. TEST_MAPPING