student context cards feature flag
student context cards feature flag

closes FALCOR-10

Test plan:
  the account feature flags page should have a development feature flag for
  student context cards

Change-Id: Icc64642012e4cc94865093d9985e0d2a17c7fe42
Reviewed-on: https://gerrit.instructure.com/95369
Tested-by: Jenkins
Reviewed-by: John Corrigan <3d73713d0cc718326e4fd7c06c64e067ad6e2270@instructure.com>
Product-Review: Simon Williams <088e16a1019277b15d58faf0541e11910eb756f6@instructure.com>
QA-Review: Simon Williams <088e16a1019277b15d58faf0541e11910eb756f6@instructure.com>

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