Increment when attempting to read protected Parcel Data

Make sure to increment the parcel data position even when trying to
improperly read from protected data

Bug: 29833520

Test (M): cts-tradefed run cts -c android.os.cts.ParcelTest -m
testBinderDataProtection
Test (M): cts-tradefed run cts -c android.os.cts.ParcelTest -m
testBinderDataProtectionIncrements
Test: cts-tradefed run cts -m CtsOsTestCases -t
android.os.cts.ParcelTest#testBinderDataProtection
Test: cts-tradefed run cts -m CtsOsTestCases -t
android.os.cts.ParcelTest#testBinderDataProtectionIncrements

Change-Id: Ie4aae6277fc5f5c924f603d9828c3a608998b986
Merged-In: Ie4aae6277fc5f5c924f603d9828c3a608998b986
(cherry picked from commit 6a825e8a)