Android: add build file and owner file.

Bug: 135204414
Test: mmma external/OpenCSD
Change-Id: I1bf8ab572feff303f527aa6ac906f59227bcfb13
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..e5b5f6f
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1 @@
+include toolchain/llvm_android:/OWNERS