Add additional Bazel mode integration tests

Add tests to verify that Atest defaults to running the device variant
unless the '--host' command-line argument is specified.

Bug: 226389735
Test: atest --host bazel_mode_test
Change-Id: I4a88601833d576c1d9eae05874e4dfee9a1fe50d
Merged-In: I04660e4206baa6b1c8141f34e7829be6f8657b78
Merged-In: Ic1a3d8b9961aa61b8a8963888a86ca04ebb84e91
Merged-In: Ic70624fe72c81f0f21a75ff8224c790832a7daa2
Merged-In: I5d5b57885a6bba6e58f2d7a6264c6b078988227b
1 file changed