Revert "Revert "Weaver HAL""

This reverts commit 66d499a26faa4603af9b8140cb1d620431b036a5.
Test: It builds

Change-Id: I204e46e7ab7c91454a4561ff44bf9920ca78d6a5
diff --git a/weaver/Android.bp b/weaver/Android.bp
new file mode 100644
index 0000000..bbb3e4b
--- /dev/null
+++ b/weaver/Android.bp
@@ -0,0 +1,4 @@
+// This is an autogenerated file, do not edit.
+subdirs = [
+    "1.0",
+]