Add METADATA to libchrome: contains GPL+LGPL=RESTRICTED

Bug: 68860345
Bug: 69058154
Bug: 151953481

Test: no code changes

Change-Id: If0ddf4729d3f1bc83bb50b67c5218a7cb97154ce
diff --git a/METADATA b/METADATA
new file mode 100644
index 0000000..6d8601b
--- /dev/null
+++ b/METADATA
@@ -0,0 +1,3 @@
+third_party {
+  license_type: RESTRICTED
+}