Add range-based Parcel::hasFileDescriptorsInRange(offset, len)

To be used by lazy values in bundle. I also reused the new code in
scanForFds().

Test: atest -d android.os.cts.ParcelTest android.os.cts.BundleTest android.os.BundleTest android.os.ParcelTest
Bug: 195622897
Change-Id: Icce738d4c87d086bffb7dfeb1b39a6bbce8f9af3
3 files changed