Return an empty PluginList instead of null for the deprecated getPluginList() api.
Return an empty PluginList instead of null for the
deprecated getPluginList() api.

Fix http://b/issue?id=2249732
xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base