Generate apex_available from c2a instead of a patch

Test: Run c2a
Test: Build
Change-Id: I2ecfc279a2a777e71091e567ff1119bfb8298c2d
diff --git a/cargo2android.json b/cargo2android.json
new file mode 100644
index 0000000..723587f
--- /dev/null
+++ b/cargo2android.json
@@ -0,0 +1,11 @@
+{
+  "apex-available": [
+    "//apex_available:platform",
+    "//apex_available:anyapex"
+  ],
+  "dependencies": true,
+  "device": true,
+  "features": "std",
+  "min-sdk-version": "29",
+  "run": true
+}
\ No newline at end of file