Fix 🙏 cut off capture icon

For some reason, on some Android devices, the capture icon was cut off.
Setting background color to the button seems to fix this (probably an RN issue)

src/CameraScreen/CameraKitCameraScreenBase.js

@@ -243,7 +243,7 @@ export default class CameraScreenBase extends Component {
 
   renderBottomButtons() {
     return (
-      <View style={styles.bottomButtons}>
+      <View style={[styles.bottomButtons, {backgroundColor: '#ffffff00'}]}>
         {this.renderBottomButton('left')}
         {this.renderCaptureButton()}
         {this.renderBottomButton('right')}