Add options to dump Widevine Cdm properties,
Widevine Cdm metrics, or both.
The valid arguments are Cdm Metrics (m|M) or Cdm Properties (p|P).
If no arguments are provided, both Cdm properties and
Cdm metrics will be displayed.
Test: adb shell lshal debug [drm service] [m/p]
adb shell lshal debug android.hardware.drm@1.3::IDrmFactory/widevine
Bug: 154027349
Change-Id: I95c10dd7d4274226936295c73be4eb1612c2ef6a