Since commit fb00d82f32 has added
get_bootloader_message_blk_device() as an API, switch the tests-local
implementation to it.
Test: recovery_component_test on angler.
Test: recovery_component_test on a local build that doesn't have /misc.
Change-Id: I4f5f542cb9ef58292c587a677da73d8822db7262
Also factor out the common parts in {setup,clear}_bcb into a separate
function.
Test: recovery_component_test
Change-Id: I7b95cced925c8135e020dcb791ca2425d4f28449
Skip these two tests if /misc partition is not found in fstab.
Bug: 35712836
Test: Both test skip correctly if there's no /misc in fstab.${hardware}.
Change-Id: I38417a8677030229a335e43eaef85ae70c4e0845
Bug: http://b/33534933
Test: recovery_component_test passes (and fails on buggy build due to
the CL in [1]).
[1]: commit 7e31f421a5
Change-Id: I120498048ec1db8f9fcbb3cf135c05d3a48cfcdf
