Fix one and hide the other warnings from core/jni

Most of the warnings are unused parameter from skia functions.

Change-Id: I9df57718d117c26b96163f751ccb056ca86ac072
XmlUtils#readThisMapXml should handle null keys.

Both readThisValueXml & writeThisValueXml have been
implemented to handle values with "null" names.

Change readThisMapXml to allow such names as well, and
map them to the null key in the resulting HashMap.
readThisListXml and readThisSetXml already support
null names.

bug: https://code.google.com/p/android/issues/detail?id=63463

Change-Id: I1c93976656e45e7733113eb67d29b6bad5d25f1f
Don't try to set service.bootanim.exit

init has never allowed the bootanimation code to
set service.bootanim.exit, and has always generated the
dmesg error message

  <3>[   17.644615] init: sys_prop: permission denied uid:1003  name:service.bootanim.exit

Since setting this property has no effect and never worked, delete
the code which tries to do it.

Change-Id: Idacc5467d85479a8cf974702af8895011be585ea
Fix: Don't disabe rotation lock tile

     Rotation lock tile was disabled if the user unchecked the Auto-rotate
     screen option directly from within the accessibilty settings.

Change-Id: I8a4fd11b9046507f8f07db515022ea6a4210bac5
Merge "Fix one and hide the other warnings from core/jni" into kitkat
Merge "XmlUtils#readThisMapXml should handle null keys." into kitkat
Merge "Don't try to set service.bootanim.exit" into kitkat
Merge "Fix: Don't disabe rotation lock tile" into kitkat