Fix the dist target when building in AOT (deploy) mode on Android (#2617)

sky/dist/BUILD.gn

@@ -110,7 +110,7 @@ if (is_android) {
 group("dist") {
   deps = []
 
-  if (!is_ios && !is_mac) {
+  if (!flutter_aot) {
     deps += [ ":sky_shell" ]
   }
 

sky/tools/gn

@@ -89,6 +89,7 @@ def to_gn_args(args):
     else:
         gn_args['target_cpu'] = 'x64'
 
+    gn_args['flutter_aot'] = aot
     if aot:
         gn_args['flutter_aot'] = True
         gn_args['dart_target_arch'] = gn_args['target_cpu']