Merge "libbinder: Document getCalling*" am: 8ba800fd am: 8c35f81d am: ed688ee8

            status_t            clearLastError();

            /**

             * Returns the PID of the process which has made the current binder

             * call. If not in a binder call, this will return getpid. If the

             * call is oneway, this will return 0.

             */

            pid_t               getCallingPid() const;

            // nullptr if unavailable

            //

            // this can't be restored once it's cleared, and it does not return the

            // context of the current process when not in a binder call.

            /**

             * Returns the SELinux security identifier of the process which has

             * made the current binder call. If not in a binder call this will

             * return nullptr. If this isn't requested with

             * IBinder::setRequestingSid, it will also return nullptr.

             *

             * This can't be restored once it's cleared, and it does not return the

             * context of the current process when not in a binder call.

             */

            const char*         getCallingSid() const;

            /**

             * Returns the UID of the process which has made the current binder

             * call. If not in a binder call, this will return 0.

             */

            uid_t               getCallingUid() const;

            void                setStrictModePolicy(int32_t policy);