Make lots of tests run in parallel

Putting t.Parallel() in each test makes them run in parallel.
Additional t.Parallel() could be added to each subtest, although
that requires making a local copy of the loop variable for
table driven tests.

Test: m checkbuild
Change-Id: I5d9869ead441093f4d7c5757f2447385333a95a4

sh/sh_binary_test.go

@@ -61,6 +61,7 @@ func testShBinary(t *testing.T, bp string) (*android.TestContext, android.Config
 }
 
 func TestShTestSubDir(t *testing.T) {
+	t.Parallel()
 	ctx, config := testShBinary(t, `
 		sh_test {
 			name: "foo",
@@ -81,6 +82,7 @@ func TestShTestSubDir(t *testing.T) {
 }
 
 func TestShTest(t *testing.T) {
+	t.Parallel()
 	ctx, config := testShBinary(t, `
 		sh_test {
 			name: "foo",
@@ -111,6 +113,7 @@ func TestShTest(t *testing.T) {
 }
 
 func TestShTest_dataModules(t *testing.T) {
+	t.Parallel()
 	ctx, config := testShBinary(t, `
 		sh_test {
 			name: "foo",
@@ -170,6 +173,7 @@ func TestShTest_dataModules(t *testing.T) {
 }
 
 func TestShTestHost(t *testing.T) {
+	t.Parallel()
 	ctx, _ := testShBinary(t, `
 		sh_test_host {
 			name: "foo",
@@ -190,6 +194,7 @@ func TestShTestHost(t *testing.T) {
 }
 
 func TestShTestHost_dataDeviceModules(t *testing.T) {
+	t.Parallel()
 	ctx, config := testShBinary(t, `
 		sh_test_host {
 			name: "foo",