simpleperf: make inferno flamegraph resizable.

By using jqueryui resizable and set the width of each
node by percentage, we can make the flamegraph resizable.

Bug: http://b/64035530
Test: run inferno.sh.
Change-Id: I1d56e4eecbceaa6189eff25995d20f758a8b4111
8 files changed