Direct Bazel builds from m.

This CL extends the `m` function to short circuit to Bazel iff:

1) USE_BAZEL_ANALYSIS is set to 1 or true
2) There is only 1 Soong module requested to be built
3) The Soong module has a corresponding Bazel alias target in @soong_injection//targets/BUILD to the real target in out/soong/workspace.

Test: TH
Change-Id: I976ffa53106c0b52c75b71f1e0e1e8b3ef5cb3d1