Fix for Segv in impd_down_mix function in xaac.

Enough size was not allocated for DRC payload.
Added appropriate size to persistence memory to accommodate maximum
length of DRC payload data. Also added reset for bit-handler elements
after execute call.

Bug:141290162
Test: poc in bug

Change-Id: I61176076056899310a3306818cd5ad4624a4bab0
4 files changed