Revert "Make lots of tests run in parallel"

This reverts commit 323dc60712.

Reason for revert: Possible cause of test instability
Bug: 170513220
Test: soong tests

Change-Id: Iee168e9fbb4210569e6cffcc23e60d111403abb8

ui/status/status_test.go

@@ -53,7 +53,6 @@ func (c counterOutput) Expect(t *testing.T, counts Counts) {
 }
 
 func TestBasicUse(t *testing.T) {
-	t.Parallel()
 	status := &Status{}
 	counts := &counterOutput{}
 	status.AddOutput(counts)
@@ -102,7 +101,6 @@ func TestBasicUse(t *testing.T) {
 
 // For when a tool claims to have 2 actions, but finishes after one.
 func TestFinishEarly(t *testing.T) {
-	t.Parallel()
 	status := &Status{}
 	counts := &counterOutput{}
 	status.AddOutput(counts)
@@ -131,7 +129,6 @@ func TestFinishEarly(t *testing.T) {
 
 // For when a tool claims to have 1 action, but starts two.
 func TestExtraActions(t *testing.T) {
-	t.Parallel()
 	status := &Status{}
 	counts := &counterOutput{}
 	status.AddOutput(counts)
@@ -152,7 +149,6 @@ func TestExtraActions(t *testing.T) {
 
 // When a tool calls Finish() with a running Action
 func TestRunningWhenFinished(t *testing.T) {
-	t.Parallel()
 	status := &Status{}
 	counts := &counterOutput{}
 	status.AddOutput(counts)