available() bytes is counted after the last read position,
after the seek to new position, size should be compared
with the avaliable directly (without adding position).
bug: 120086693
test: Open .heic files in Downloads/Photos that's either
very small (b/117625929, b/111897855), or with the meta
at the very end (b/120086693). There shouldn't be error
in ExifInterface.
Change-Id: I37ac57823b26f03bb0ba555ee6213cf999942d21
317316fb2b