tools/symbolize-ui-crash: switch to Gerrit URLs
tools/symbolize-ui-crash: switch to Gerrit URLs

We don't mirror the ui-stable/canary branches on GitHub.
The links generated by the tool were invalid.
Just switch them over to point to AOSP

Test: manual
Change-Id: Iced681926813c4d7523dc1902e338a02ffafab10
google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto