Remove incorrect usage of AlertDialog.Builder.create

AlertDialog.Builder.show() will create an AlertDialog before it show. This is the source code snippet:

        /**
         * Creates a {@link AlertDialog} with the arguments supplied to this builder and
         * {@link Dialog#show()}'s the dialog.
         */
        public AlertDialog show() {
            AlertDialog dialog = create();
            dialog.show();
            return dialog;
        }

github: close #96
Fix CB-6048: Set launchMode=singleTop so tapping app icon does not always restart app
CB-6388: Handle binary data correctly in LOAD_URL bridge
[CB-6392]Addig amazon-fireos platform fails with not so good error reporting
Fixes 2 issues while adding amazon-fireos platform after fresh cordova install.
1. create.js updated to create "libs" folder before copying it to the project's platform folder. Also, checking for awv_interface.jar existance is moved to create_project().
2. check_reqs.js no longer checks for awv_interface.jar.
Adding a safety check to prevent applications from calling init twice
Changes to address thread safety concerns in Cordova plugin management