No longer export CallSubjectDialog am: 1f6d68c796

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Contacts/+/17008934

Change-Id: Ie6c06dc3cb079063cdf614c951459db6a0de0499
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 1110f86..80125ac 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -556,6 +556,7 @@
         <activity
             android:name="com.android.contacts.dialog.CallSubjectDialog"
             android:theme="@style/Theme.CallSubjectDialogTheme"
+            android:exported="false"
             android:windowSoftInputMode="stateVisible|adjustResize">
             <intent-filter>
                 <action android:name="android.intent.action.VIEW"/>