cargo2android: Don't emit image support for tests

Image support doesn't make sense for test modules.

Bug: 178565008
Test: Generate rustc-demangle-capi
Change-Id: Ie5a1d85f9828e0c105c3a3e994b22ef7664fe1db

scripts/cargo2android.py

@@ -712,6 +712,7 @@ class Crate(object):
       for apex in self.runner.args.apex_available:
         self.write('        "%s",' % apex)
       self.write('    ],')
+    if crate_type != 'test':
       if self.runner.args.native_bridge_supported:
         self.write('    native_bridge_supported: true,')
       if self.runner.args.product_available: