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