Add -use_bootloader and -bootloader to launch_cvd

-bootloader specifies a path to a BIOS implementation, and
-use_bootloader controls whether the BIOS implementation is used. These
are distinct arguments so that we can add a default bootloader
implementation and make it the default for all invocations in separate
steps.

Steps to access the console:

$ launch_cvd -vm_manager=qemu_cli -bootloader=$PATH/$TO/u-boot.rom -use_bootloader
$ socat file:$(tty),raw,echo=0 $HOME/cuttlefish_runtime/console

Bug: 133797099
Change-Id: Idaf647c86dc93a3821adf5b7f243351be76ba04a
Test: Run with and without -use_bootloader.
5 files changed
tree: 1ce7ff6203daddd94c99a5cd228d2629ddf9e21c
  1. common/
  2. guest/
  3. host/
  4. tests/
  5. tools/
  6. Android.bp
  7. Android.mk
  8. OWNERS
  9. TEST_MAPPING