decoder: Fix minimum poc calculation check while adding to display While adding the decoded buffer to display queue, allow buffer with poc set to 0x7FFFFFFF Bug: 145364230 Test: poc in bug Change-Id: I2a15f73b8422cfa4fd3360bc21c0cea4542a3375 (cherry picked from commit ffcf2a87d66f935210ebd011eed474514d086b40)