Adding dependency_mapper cmd tool.

This will be used for incremental builds in soong.

Bug: 387799000
Flags: NA
Test: m dependency-mapper && atest dependency-mapper-tests
Change-Id: Id0d0f9e4daf1c7ee3896779abdafde679d01ee31
diff --git a/tools/dependency_mapper/OWNERS b/tools/dependency_mapper/OWNERS
new file mode 100644
index 0000000..4477269
--- /dev/null
+++ b/tools/dependency_mapper/OWNERS
@@ -0,0 +1 @@
+himanshuz@google.com
\ No newline at end of file