Migrate Vector to libxposed API 101(#586)

We comprehensively upgrade the Vector framework to support the modern libxposed API 101, replacing the legacy before/after callback model (API 100) with a OkHttp-style interceptor chain architecture.

Note that Vector no longer supports API 100 after this migration.
See README inside the module `xposed` for implementation details.

Author: JingMatrix

app/src/main/java/org/lsposed/manager/ConfigManager.java

@@ -63,7 +63,7 @@ public static String getXposedVersionName() {
         }
     }
 
-    public static int getXposedVersionCode() {
+    public static long getXposedVersionCode() {
         try {
             return LSPManagerServiceHolder.getService().getXposedVersionCode();
         } catch (RemoteException e) {