C2BqBuffer: Clear a cached buffer if reallocation is needed

If a cached buffer is required to be reallocated, clear the buffer in
the cache.
Bug: 240393739
Change-Id: I6db4a66039f0455c566e2ab009effc4a5b7f37be
(cherry picked from commit 0e212e87bd0eaf4beb6c2c2765d7760e55d5f7eb)
Merged-In: I6db4a66039f0455c566e2ab009effc4a5b7f37be
1 file changed