Enable androidmk processing in sdk testing

Previously, while sdk tests would pass the sdk code would often fail
in androidmk processing. This change makes the tests more realistic
and will catch the errors earlier.

Bug: 142935992
Bug: 153306490
Test: m nothing
Merged-In: Ifd0b2d7cf24e941c919f6b6e0beb2403a67d4308
Change-Id: Ifd0b2d7cf24e941c919f6b6e0beb2403a67d4308

android/testing.go

@@ -410,6 +410,10 @@ func CheckErrorsAgainstExpectations(t *testing.T, errs []error, expectedErrorPat
 
 }
 
+func SetInMakeForTests(config Config) {
+	config.inMake = true
+}
+
 func AndroidMkEntriesForTest(t *testing.T, config Config, bpPath string, mod blueprint.Module) []AndroidMkEntries {
 	var p AndroidMkEntriesProvider
 	var ok bool