Extend scrolling prediction presentation time histograms

Specifically extend:
- Event.Latency.ScrollUpdate.Touch.AverageLagPresentation.PredictionNegative
- Event.Latency.ScrollUpdate.Touch.AverageLagPresentation.PredictionPositive

There is ongoing work to improve scrolling prediction which will benefit
from having these heuristics to gauge improvements on.

Bug: 1165055
Change-Id: Ia01705af79ea0566a2236f30c1b0e2657ecf2e02
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2628136Reviewed-by: Caitlin Fischer <caitlinfischer@google.com>
Commit-Queue: Robert Flack <flackr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843609}

tools/metrics/histograms/histograms_xml/event/histograms.xml

@@ -1153,7 +1153,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 
 <histogram
     name="Event.Latency.ScrollUpdate.Touch.AverageLagPresentation.PredictionNegative"
-    units="pixels" expires_after="M90">
+    units="pixels" expires_after="M97">
   <owner>flackr@chromium.org</owner>
   <owner>joalmei@microsoft.com</owner>
   <owner>input-dev@chromium.org</owner>
@@ -1179,7 +1179,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 
 <histogram
     name="Event.Latency.ScrollUpdate.Touch.AverageLagPresentation.PredictionPositive"
-    units="pixels" expires_after="M90">
+    units="pixels" expires_after="M97">
   <owner>flackr@chromium.org</owner>
   <owner>joalmei@microsoft.com</owner>
   <owner>input-dev@chromium.org</owner>