[TIMOB-27741] Android: Allow requestPermissions to succeed if already granted

const overlay = Ti.UI.createView({});
const takePicture = Ti.UI.createButton({ title: 'Take Picture' });

takePicture.addEventListener('click', _ => {
    Ti.Media.takePicture();
});
overlay.add(takePicture);

// Should not need to call 'hasCameraPermissions', 'requestCameraPermissions' should succeed.
Ti.Media.requestCameraPermissions(e => {
    if (e.success) {
        Ti.Media.showCamera({
            success: e => {
                if (e.success) {
                    console.log('Taken picture successfully!');
                } else {
                    console.error(JSON.stringify(e, null, 2));
                }
            },
            saveToPhotoGallery: true,
            autohide: false,
            overlay: overlay,
            mediaTypes: [ Ti.Media.MEDIA_TYPE_PHOTO ]
        });
    }
});