Upgrade libmpeg2 to v1.3.0 am: a4c40189d5 am: 84fd244680 am: e3848276ba

Original change: https://android-review.googlesource.com/c/platform/external/libmpeg2/+/2798076

Change-Id: Icdbc9954c759f9337194466d91211e6e6eb51629
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>