ProcessCpuTracker: Fix ArrayIndexOutofBoundsException in tempSpeeds

If time_in_state file is not available mCpuSpeeds is created with size 0
and subsequent call if the file becomes available there is an
ArrayIndexOutofBoundsException.
This change avoids the crash by breaking out of the loop, also adds error
logging

CRs-Fixed: 553569
Change-Id: Id5e219ca1cd3f058f714aecd5902ec2f6c11ae03
Replace SEAndroid with SELinux.

Change-Id: Ibbe544a9f025d71ad416bc01cee2145b62d7b2d4
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>