GN(android): Add scripts & runtime logic for installing _managed apks

base/android/java/src/org/chromium/base/BaseChromiumApplication.java

Index: base/android/java/src/org/chromium/base/BaseChromiumApplication.java
diff --git a/base/android/java/src/org/chromium/base/BaseChromiumApplication.java b/base/android/java/src/org/chromium/base/BaseChromiumApplication.java
index d7c7b05ea58d88808aef44d10e798448e74ec0ca..982cafc4b973b82494331d37fcb002d53e63dad7 100644
--- a/base/android/java/src/org/chromium/base/BaseChromiumApplication.java
+++ b/base/android/java/src/org/chromium/base/BaseChromiumApplication.java
@@ -95,6 +95,13 @@ public class BaseChromiumApplication extends Application {
             return mCallback.dispatchKeyEvent(event);
         }
     }
+
+    @Override
+    protected void attachBaseContext(Context base) {
+        super.attachBaseContext(base);
+        ManagedInstall.initialize(this);
+    }
+
     @Override
     public void onCreate() {
         super.onCreate();