Android: Add baseline.xml to lint's input

Changes to baseline.xml should trigger re-linting.

Bug: None
Change-Id: I03f8528e0eba540941eff2784533253c7789f9ee
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2314695
Commit-Queue: Peter Wen <wnwen@chromium.org>
Auto-Submit: Peter Wen <wnwen@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791811}

build/config/android/internal_rules.gni

@@ -1058,13 +1058,17 @@ if (enable_java_templates) {
           "//build/android:prepare_android_lint_cache",
           invoker.build_config_dep,
         ]
-        inputs += [ invoker.build_config ]
         _rebased_build_config =
             rebase_path(invoker.build_config, root_build_dir)
 
         # TODO(wnwen): Remove this baseline once it is empty.
-        baseline = "//build/android/lint/baseline.xml"
-        _rebased_baseline = rebase_path(baseline, root_build_dir)
+        _baseline = "//build/android/lint/baseline.xml"
+        _rebased_baseline = rebase_path(_baseline, root_build_dir)
+
+        inputs += [
+          _baseline,
+          invoker.build_config,
+        ]
 
         args += [
           "--manifest-path=@FileArg($_rebased_build_config:deps_info:lint_android_manifest)",