Add missing features in MediaSDK plugin [metabug]

Submitted by Sreerenj Balachandran @sree

Link to original bug (#789886)

Description

The gst-msdk plugin is missing many of the features required for customers.
This is a meta bug for tracking media-sdk GStreamer plugin development and also to discuss the design options.

Please file separate bugs for each feature listing here.

Depends on

• Bug 786879
• Bug 793411
• Bug 793414
• Bug 793495
• Bug 793782
• Bug 793784
• Bug 793906
• Bug 794851
• Bug 794944
• Bug 796232
• Bug 796459
• Bug 796460
• Bug 796461
• Bug 796462
• Bug 796521
• Bug 796522
• Bug 796819
• Bug 789751
• Bug 789752
• Bug 789847
• Bug 790312
• Bug 790752
• Bug 791479
• Bug 791599
• Bug 791637
• Bug 792260
• Bug 792589
• Bug 793236
• Bug 793412
• Bug 793413
• Bug 793415
• Bug 793525
• Bug 793705
• Bug 793707
• Bug 793708
• Bug 793741
• Bug 793781
• Bug 793786
• Bug 793787
• Bug 793864
• Bug 793865
• Bug 793867
• Bug 793869
• Bug 793872
• Bug 793873
• Bug 793904
• Bug 794276
• Bug 794817
• Bug 794946
• Bug 794991
• Bug 795707
• Bug 795783
• Bug 796118
• Bug 796119
• Bug 796464
• Bug 796465
• Bug 796467
• Bug 796468
• Bug 796469
• Bug 796566
• Bug 796699