Fix issue #122854187: Need to report page fragmentation in procstats protobuf

Add the page fragmentation data to the current protobuf.

Also fix bugs in how it was being collected...  the data in the kernel
didn't match what it was collecting (it was combining node and zone
together in a zone int...  but node is an int, zone is a separate
string).

Example new output:

vailable pages by page size:
Node   0 Zone     DMA       Unmovable      0     1     1     1     0     1     1     0     0     0     0
Node   0 Zone     DMA     Reclaimable      1     1     0     1     1     1     1     1     1     0     0
Node   0 Zone     DMA         Movable      1     1     0     0     1     0     1     0     1     1   291
Node   0 Zone     DMA             CMA      1     1     0     0     0     1     1     1     1     1    35
Node   0 Zone     DMA         Reserve      0     0     0     0     0     0     0     0     0     0     1
Node   0 Zone     DMA         Isolate      0     0     0     0     0     0     0     0     0     0     0
Node   0 Zone  Normal       Unmovable      1     9     3     2     1     0     1     0     1     0     0
Node   0 Zone  Normal     Reclaimable      0    15     3     3     1     0     1     0     1     0     0
Node   0 Zone  Normal         Movable      0     1     1     1     0     0     1     1     0     1   338
Node   0 Zone  Normal             CMA      0     0     0     0     0     0     0     0     0     0     0
Node   0 Zone  Normal         Reserve      0     0     0     0     0     0     0     0     0     0     2
Node   0 Zone  Normal         Isolate      0     0     0     0     0     0     0     0     0     0     0

Change-Id: I029d59b8d088b20fafaea04dde766012c3d448cd
Fixes: 122854187
Test: manual