Add protectionLevels variable to mw.title output

Include a protectionLevels variable in the output of the mw.title.*
functions, containing the contents of the title's mRestrictions
array (i.e., its protection levels)

Change-Id: I79c9fed64bacfc90aee1d411a3e1b47e44c99755
Merge "Add protectionLevels variable to mw.title output"