Extract prefix and suffix html blocks to separate files DO NOT MERGE

The Monitor tool in SDK has a duplicate copy of the prefix and suffix
html blocks, which necessitates changes in both places whenever the
prefix block changes. Moving the html out of the script allows
Monitor to reuse the same content.

Change-Id: I012df9ef3423b546a2ced213bee1ccbba9d4c9cc
Merge tag 'android-4.3_r3.1' of https://android.googlesource.com/platform/external/chromium-trace into cm-10.2

Android 4.3 Release 3.1