In java, System.getProperty returns null when the property doesn't exist, rather than an empty string like it does in native code. b/3157546
In java, System.getProperty returns null when the property doesn't exist,
rather than an empty string like it does in native code.
b/3157546

Change-Id: I7985a405e4d2d1f20be0a151aa2cf2e5a83b380b

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base