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

android/module_test.go

@@ -19,6 +19,7 @@ import (
 )
 
 func TestSrcIsModule(t *testing.T) {
+	t.Parallel()
 	type args struct {
 		s string
 	}
@@ -66,6 +67,7 @@ func TestSrcIsModule(t *testing.T) {
 }
 
 func TestSrcIsModuleWithTag(t *testing.T) {
+	t.Parallel()
 	type args struct {
 		s string
 	}
@@ -164,6 +166,7 @@ func depsModuleFactory() Module {
 }
 
 func TestErrorDependsOnDisabledModule(t *testing.T) {
+	t.Parallel()
 	ctx := NewTestContext()
 	ctx.RegisterModuleType("deps", depsModuleFactory)