encoder: Update chroma modules to avoid reading an extra byte

When processing V plane, an extra byte was being read in some
of the neon modules.
Modules are now updated to avoid that extra byte read.

Bug: 177433559
Bug: 183012467

Test: poc in bug
Test: atest CtsMediaTestCases:VideoEncoderTest
Test: atest CtsMediaV2TestCases:CodecEncoderTest
Test: atest VtsHalMediaC2V1_0TargetVideoEncTest

Change-Id: I598c50f727b4d62f19523cbb008482e27de5e3cc