Property changes now show up on hierarchy view.

Entries that have a modification are now highlighted in cyan on the
hierarchy view.

Test: Find any entry, run a trace - if any properties change at a
particular timestamp they should be highlighted as cyan on the hierarchy
view.

Bug: b/162302603
Change-Id: I1d187ac669f1ff479b7f4e46903576380454a709
3 files changed