Add read/write for List<ParcelFileDescriptor> in Java

While ParcelableFileDescriptor is built-in type, it IS a parcelable. So
we can treat it just like defined parcelable types when reading/writing.

Bug: 171229850
Test: aidl_unittests / aidl_integration_test
Change-Id: I2fac70a80a39ce0ccae5c91b09e4d331333ec758
4 files changed