Update android.print.PrintAttributes documentation
Update android.print.PrintAttributes documentation

bug:10550844

Change-Id: Ic1bbb2cb6ab55826eb66242f6002b7165aff37a4

Conflicts:
	core/java/android/print/PrintAttributes.java

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