RelayDevice configs can now be in-lined in testbeds

RelayDevice configs can either be specified by a path
(relative or absolute) or can be inlined into the test bed.

Bug: 67331698
Test: act.py -c inlined_relay.config -tc SampleRelayDeviceTest
Test: act.py -c acts_config_without_relay -tc SampleRelayDeviceTest
Test: unit tests pass
Change-Id: I8bc6e06f69f9beb7fdd45142f557b42773e737aa
(cherry picked from commit 93e8f3e694778dc6c192cae453f3375bf143f9ee)
(cherry picked from commit 78355b8227b931a310b29055ed902b2d918f9ba4)
1 file changed
tree: cdb2f399aa71d2a1352dee968e45007a7fa587f6
  1. acts/
  2. tools/
  3. Android.mk
  4. PREUPLOAD.cfg