libhevcdec: iquant-itrans issue in chroma planes

Misplaced local array on stack is resulting in color artifacts in
decoded yuv. It worked so far, because the array luma_nbr_flags_4x4[]
was always allocated on the same address and thus preserved values from
previous iteration.

Bug: 148157334
Test: atest
Change-Id: Ic2b1964895bf26101508ff2ac82a94192b7b74f8
1 file changed