* iOS: minor focus and zoom changes
RCTCameraManager focusAtThePoint improvements
- Dynamicaly get size from bounds of camera view, instead of full screen, since
it might not always be the case that the Camera react component is taking up
the entire device screen.
- Also add setting exposure to the same point of interest we are focusing on.
Example
- Add onFocusChanged and onZoomChanged empty callback functions by default to
Example app, allowing tap-to-focus and pinch-to-zoom to be readily
experienced/experimented with.
- Updated react/react-native dependencies to match root package.json.
TODO/Other remarks
- Tap-to-focus seems to still not work perfectly... From logging, it always seems
to get the right location in the view (meaning its getting the right location
from the user touch and transforming it to the {0, 1} range appropriately), and
does indeed engage the focus process, but it seems it sometimes refocuses on the
center-ish region of what's in the camera instead of the location that was actually
pressed. I thought this might be related to the subjectAreaDidChange getting called,
which in turn sets the focus mode to continuous auto-focus at the view center, but
from my experimenting, this method never actually gets called. I wasn't able to
figure out if there's somewhere else in the library that's forcing continuous auto-focus,
or if there's just some bug in our current focus procedure within focusAtThePoint.
* Reset Example/package.json dependency versions to master
20b0721850