implement hide method on android

Author: msalcala11

src/android/ChromeCustomTabPlugin.java

@@ -139,6 +139,11 @@ public boolean execute(String action, JSONArray args, CallbackContext callbackCo
                 }
                 return true;
             }
+            case "hide": {
+                cordova.getActivity().startActivity(new Intent(cordova.getActivity(), cordova.getActivity().getClass()));
+                callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.OK, true));
+                return true;
+            }
         }
         return false;
     }