[project][qemu] Wait for adb transport to disappear in teardown

Fixes random timeout errors when adb_up found the transport id from the
previous qemu instance instead of waiting for the new qemu instance to
become ready.

Bug: 136573213
Change-Id: I498f8853668b5593396894921ec92c2ac15d6e26
1 file changed
tree: 5142e5ec0b5593d95f70a2a352a830b9c8b33f64
  1. .clang-format
  3. PREUPLOAD.cfg
  4. project/