audio: fix log printing issue

1.remove the unused variable bufferCount and replace the new
2.adjust the log postition of variable bufferSize

Flag: EXEMPT log fix
Bug: 414732700
Test: N/A

Signed-off-by: jiangyao <jiangyao@xiaomi.com>
(cherry picked from https://android-review.googlesource.com/q/commit:ece5fdf246fb9b458e85f4260a70f9efd2a03cc3)
Merged-In: I605fa254abc922a475f64b6f87443bbe3454e2a8
Change-Id: I605fa254abc922a475f64b6f87443bbe3454e2a8