fix NoSuchElementException error with CPU ProcessStats

Credit to Eugene373

p2: update commit message
p3: cleaned up tabs
p4: also added aosp changes from this commit - https://github.com/android/platform_frameworks_base/commit/ca894b396b93344ac255746e12730cb269d4d856

Signed-off-by: Jonathan Steadman <xxwhitehawk@gmail.com>
Change-Id: I3c71dbd5fb8e42811c47d6431003101943cb388a