This change is to allow the CPU Idle Histogram Stats to be dumped in
bugreports so that there is more insight into the idle behavior of
devices in the field.
Test: Build/Flash
Test: Collect histogram log
Bug: 344908619
Flag: EXEMPT bugfix
Change-Id: I3a670060048b620c9d20f1a4dedbd4d992e925ca
Signed-off-by: Vishvam Mazumdar <vmazumdar@google.com>