v4l2_codec2: rename libv4l2_codec2_vda to libv4l2_codec2_accel

We are adding video encode accelerator (VEA) related codes into this library.
So we would like to rename it to *_accel.

Bug: 73059339
Test: build image
Change-Id: I66c574b66d4fdf9014db304b0d97c19c248718c1
(cherry picked from commit 7ba9f723f767e78b04b330f66901beeadff4915d)
62 files changed