androidenv: do not copy verbosely

Verbose copying can exceed hydra's output limit,
causing spurious failures. For example, see:
https://hydra.nixos.org/eval/1644892?filter=android

pkgs/development/mobile/androidenv/deploy-androidpackage.nix

@@ -29,7 +29,7 @@ stdenv.mkDerivation ({
     packageBaseDir=$out/libexec/android-sdk/${package.path}
     mkdir -p $packageBaseDir
     cd $packageBaseDir
-    cp -av $sourceRoot/* .
+    cp -a $sourceRoot/* .
     ${patchInstructions}
   '';