Populate Format.codecs for video tracks in MKV/MP4

How it should look:

How it shows up on ExoPlayer:

### [REQUIRED] Content description
> General
Unique ID : 267980416984396205961281129986639226741 (0xC99B26A52E58A2903E58B4672DDB6775)
Complete name : O:\Video\Pexels Videos 1824697-1.mkv
Format : Matroska
Format version : Version 4
File size : 381 KiB
Duration : 10 s 965 ms
Overall bit rate : 285 kb/s
Encoded date : UTC 2019-05-13 11:08:24
Writing application : HandBrake 1.2.0 2018121700
Writing library : Lavf58.20.100
ErrorDetectionType : Per level 1

> Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High 10@L4
Format settings : 4 Ref Frames
Format settings, CABAC : No
Format settings, Reference frames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 10 s 911 ms
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 29.970 (30000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Scan type : Progressive
Writing library : x264 core 157 r2935 545de2f
Encoding settings : cabac=0 / ref=2 / deblock=0:0:0 / analyse=0x3:0x113 / me=hex / subme=6 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=0 / open_gop=0 / weightp=0 / keyint=300 / keyint_min=30 / scenecut=40 / intra_refresh=0 / rc_lookahead=30 / rc=crf / mbtree=1 / crf=51.0 / qcomp=0.60 / qpmin=0 / qpmax=81 / qpstep=4 / vbv_maxrate=60000 / vbv_bufsize=75000 / crf_max=0.0 / nal_hrd=none / filler=0 / ip_ratio=1.40 / aq=1:1.00
Default : Yes
Forced : No
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

> Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : A_AAC-2
Duration : 10 s 965 ms
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Delay relative to video : -21 ms
Title : Stereo
Default : Yes
Forced : No

### [REQUIRED] Link to test content
Re-encode of https://www.pexels.com/video/view-of-city-in-timelapse-mode-1824697/
available at https://ufile.io/rib5ossq or https://drive.google.com/file/d/1srqww7ziBEXhWZDDbfSRxOtKEW_QIjGe/view?usp=sharing

### [REQUIRED] Version of ExoPlayer being used
2.9.1

### [REQUIRED] Device(s) and version(s) of Android being used
Samsung Galaxy S8 9.0