Reduce parcel size to avoid binder transaction failure

Reduce buffer size to 8192 to avoid binder transaction failures.
According to our previous tests. Reducing the buffer size to 8K
doesn't show negative impact on performance.

Bug: 132923636
Test: Successfully install a DSU
Change-Id: Ibe51ab748b4f6c1d3c3ac8286519380ea8afc184
1 file changed