Set PATH and --action_env=PATH for the Bazel build in soong_ui.

Ensures that Bazel and Ninja are using the same binaries from PATH, such
as `sort` from the linked bug.

Test: USE_BAZEL=1 m
Test: rm out/soong/apex/depsinfo/new-allowed-deps.txt && USE_BAZEL=1 m
Bug: 161074854
Fixes: 161074854
Change-Id: Icc3e717e6d3cfcecfe90f0fb3a94a86485a11918