QCamera2/HAL3: Fixing frame dumping logic

Issue:
The value given for setprop for frame dumping is
being typecasted to uint8 due to which dumping
more than the default number of frames and
skipping of frames during dumping will not
be possible.

Fix:
Typecast the value to uint32 instead of uint8.

Ack-by: Abhishek Pant
BUG=29902298

CRs-fixed: 1032033
Change-Id: I3b5093f1ec0160e1a63b2db80a5465fd299c8cf9
2 files changed