[TIMOB-19486] Android: Generate missing app icons based on DefaultIcon.png

var missingIcons = [
    {
        description: 'Resources/<platform>/appicon.png - Used for iPhone', // some meaningful description... iOS build dynamically generates this
        file: '/path/to/dest.png', // MUST be a png and MUST have an extension
        width: 100, // whatever is required
        height: 100, // should match width
        required: true // when DefaultIcon.png isn't big enough, true will trigger an error and false will skip the icon
    }
];

this.generateAppIcons(missingIcons, function (err) {
    // err is either true if there was an error or undefined if it was successful
});