dumpstate: allow dumpstate to access displaycolor

In bugreport, we need to dump libdisplaycolor information.
Hence, we should add corresponding sepolicy.

Bug: 181915591
Test: There is no avc denied regarding to displaycolor when we
capture the bugreport.

Change-Id: I9f7f8f451fab24b4d0c49305d96b8db6b4d0eed4
2 files changed