dex_import can be added to apex

Bug:157886942
Test: m
Change-Id: Ida6f7bb784efe74cc1fa0e8d370eaee803f08b0f

java/java.go

@@ -2691,6 +2691,10 @@ func (j *DexImport) Stem() string {
 	return proptools.StringDefault(j.properties.Stem, j.ModuleBase.Name())
 }
 
+func (a *DexImport) JacocoReportClassesFile() android.Path {
+	return nil
+}
+
 func (j *DexImport) IsInstallable() bool {
 	return true
 }