Feature flag for removing array mode for linear output buffers

Bug: 418813731
Flag: android.media.codec.remove_arraymode_for_linear_output_buffers
Test: atest android.mediav2.cts.CodecEncoderMultiAccessUnitTest
      atest android.mediav2.cts.CodecDecoderTest
      atest android.mediav2.cts.CodecDecoderBlockModelMultiAccessUnitTest

Change-Id: I0d5eca32d64ff560646bf33fae65cab206eb26d6