Upgrade emulator to emu-master-dev build 6629878

Update emulator to 30.0.20.

Bug: 6629878
Test: presubmit
Signed-off-by: Roman Kiryanov <rkir@google.com>
Change-Id: I1c5d6d8c5087905eaa8dcd22c07d6540bcb66fa6
26 files changed