Pass dumpsys priority to IServiceManager

Modify IServiceManger to accept supported dumpsys priority as a bitmask
with NORMAL being the default priority. Change listServices to return
a list of services filtered by the priority or all services when the
priority is set to ALL.

BUG:27429130

Test: mmm -j32 frameworks/native/cmds/dumpsys && \
      adb sync data && adb shell /data/nativetest/dumpsys_test/dumpsys_test && \
      adb shell /data/nativetest64/dumpsys_test/dumpsys_test && \
      printf "\n\n#### ALL TESTS PASSED ####\n"

Change-Id: Ibccba63035ace9970c2967a621ee2ad8d15cbeea