1. Add var _ to declare the struct Import implement IDEInfo and
IDECustomizedModuleName interfaces
2. Modify var _, a typo case for struct Module implement Dependency interface
3. Add nil checking for Dependency interface implementation
4. Add more comment for developer
Bug: 121985695
Test: 1. m aidegen
2. $ANDROID_HOST_OUT/bin/aidegen framework
3. check import static android.Manifest.permission.BIND_VOICE_INTERACTION;
denpendency should be resolved in frameworks/base/services/core/java/com/android/server/am/ActivityManagerService.java
Change-Id: Ia2d2d65b83a52d35ccb3927a36bcf686d5223e20
36ff7dcbf4