Add OWNERS for libs/net project

Owners are imported from frameworks/base/core/java/android/net/, as both
projects contain common networking libraries to be used by multiple
networking teams, and maintained by the same team.

Test: build/make/tools/checkowners.py -c -v frameworks/libs/net/OWNERS
Change-Id: Iba2cfbbaed5ecf1974f18c31d31cedb5e5dd5dcc
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..5e74ae0
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1 @@
+include platform/frameworks/base:/core/java/android/net/OWNERS