Revert "contacts: Privacy Guard support"

Also revert "Use MemoryCursor code in framework."

Change-Id: I278e3e41421693ccb309366a69ff53092e03261e
Merge "Revert "contacts: Privacy Guard support"" into cm-10.2
Merge branch 'cm-10.2' of github.com:CyanogenMod/android_packages_providers_ContactsProvider into cm-10.2