Refresh Android.bp, cargo2android.json, TEST_MAPPING.

Test: None
Change-Id: I4c1d28ff320832d2eb50a01778be9f6d77f8b641
diff --git a/Android.bp b/Android.bp
index 80237a0..6ff242f 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,4 +1,4 @@
-// This file is generated by cargo2android.py --run --device.
+// This file is generated by cargo2android.py --config cargo2android.json.
 // Do not modify this file as changes will be overridden on upgrade.
 
 package {
diff --git a/TEST_MAPPING b/TEST_MAPPING
new file mode 100644
index 0000000..d6cefe5
--- /dev/null
+++ b/TEST_MAPPING
@@ -0,0 +1,8 @@
+// Generated by update_crate_tests.py for tests that depend on this crate.
+{
+  "imports": [
+    {
+      "path": "external/rust/crates/arbitrary"
+    }
+  ]
+}
diff --git a/cargo2android.json b/cargo2android.json
new file mode 100644
index 0000000..bf78496
--- /dev/null
+++ b/cargo2android.json
@@ -0,0 +1,4 @@
+{
+  "device": true,
+  "run": true
+}
\ No newline at end of file