Check mDataPos to see if the Parcel needs to grow

Flag: EXEMPT bug fix
Ignore-AOSP-First: security fix
Test: atest binderUnitTest
Bug: 399155883
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:611b730bade54a0a79dbcc3087d9393086e6dbdf)
(cherry picked from commit fa5cdb65cb1dcd02da88d3c63869be9a346ef13f)
Cherrypick-From: https://googleplex-android-review.googlesource.com/q/commit:8129261ee7511f38ed01a2b5082820f36d299704
Merged-In: I38b755ca3381cfca3300292873f763823fbf169b
Change-Id: I38b755ca3381cfca3300292873f763823fbf169b
2 files changed