avoid extra release of unowned objects in Parcel error path

Another bug due to a huge amount of complexity in the Parcel
implementation.

Bug: 203847542
Test: added testcase fails on device w/o Parcel.cpp fix, and it passes
  on a device with the fix
Merged-In: I34411675687cb3d18bffa082984ebdf308e1c1a6
Change-Id: I34411675687cb3d18bffa082984ebdf308e1c1a6
(cherry picked from commit 04390376)