Fix the issue of Context::setBufferFormat() mix-usage in

ImageWriter/ImageReader JNI side.

- This can get rid of dataspace lost if using dataspace-dependent
  image format.
- Fix getSurfaceType() to retrieve image format instead of hal format.
- refine ImageWriter/ImageReader initializing flow.

Bug: 246344817
Test: atest android.hardware.camera2.cts.ImageReaderTest, atest
android.hardware.camera2.cts.ImageWriterTest

Change-Id: If70f8640e6c057fa4be910372282df764bb84341