sdm: Add the support of PROTECTED_CONTENTS in GetDisplayCapabilities

HWC2.4 adds the support of PROTECTED_CONTENTS in GetDisplayCapabilities
to query the hardware capability via GetDisplayCapabilities API. The
patch implement the support of the new API.

Test: atest VtsHalGraphicsComposerV2_4TargetTest
Bug: 145566569
Change-Id: I99cb00e9c10cbc9ec6619d2ae09377c129aa3955
7 files changed