TBR: devtools/internal/testutil: increase timeout of js tests to 15 minutes.
TBR: devtools/internal/testutil: increase timeout of js tests to 15 minutes.

PresubmitTest: none
Change-Id: Ieb1c1126f08cb7764297b039a9fd4366b00dec57

vanadium/go.jiri,vanadium/go.jiri