Make decoding output bit format configurable

[zhangyichix]

In order to pass Cts#testDefaultOutputColorFormat, we need to determine the output bit format by mfxparam instead of bitstream.

Tracked-On: OAM-119832

[sysopenci]

Expected syntax:
Commit message one-line summary

  Extra paragraphs can be added here.

  Longer description that explains the problem / solution
  or whatever that needs to be said

  It can contain
    multiple lines
    multiple paragraphs
    blank lines
    references

  But each paragraph must be followed by a blank line

  However, you need to keep the 'Tracked-On', 'Change-Id',
  'Signed-off-by', ..., fields in the **lastest** paragraph of
  the commit message.

  Change-Id: I9e58f79c7faf7f0edb9792e8b5322ab161331141
  Tracked-On: https://jira.server.ext/browse/PROJECTA-123
  Signed-off-by: Developer Name <developer.name@intel.com>

[sysopenci]

Expected syntax:
Commit message one-line summary

  Extra paragraphs can be added here.

  Longer description that explains the problem / solution
  or whatever that needs to be said

  It can contain
    multiple lines
    multiple paragraphs
    blank lines
    references

  But each paragraph must be followed by a blank line

  However, you need to keep the 'Tracked-On', 'Change-Id',
  'Signed-off-by', ..., fields in the **lastest** paragraph of
  the commit message.

  Change-Id: I9e58f79c7faf7f0edb9792e8b5322ab161331141
  Tracked-On: https://jira.server.ext/browse/PROJECTA-123
  Signed-off-by: Developer Name <developer.name@intel.com>

[feijiang1]

LGTM

[YuanjunHuang]

LGTM

[feijiang1]

LGTM

[feijiang1]

LGTM

[sysopenci]

Android CI has started Engineering Build for this issue ,Please check the linked Tracked-On issue/Android CI Web for more details.

[sysopenci]

SUCCESS: Android CI has completed Engineering Build for this issue.Please check the linked Tracked-On issue/Android CI Web for more details.

[sysopenci]

Android CI has started MERGE Build for this pr ,Please check the linked Tracked-On issue/Android CI Web for more details.

[sysopenci]

Android CI has completed MERGE Build for this pr, build is SUCCESS. Please check the linked Tracked-On issue/Android CI Web for more details. For Binaries: /cactus-absp-or-local/celadon-merge/660