msm: vidc: Select UBWC statistic parameters appropriately

If initial values for min_CR and min_CF are set to 0 then
while finding the minimum value in the list it will always
compare with 0 and output min_CR as 0.

Change-Id: I73a21e723a0f7111eb959439808a7d7ad46ad937
Signed-off-by: Vikash Garodia <vgarodia@codeaurora.org>
Signed-off-by: Prateek Shrivastava <pshrivas@codeaurora.org>