Only accept bunker requests inside the content provider

app/src/main/java/com/greenart7c3/nostrsigner/SignerProvider.kt

@@ -378,6 +378,7 @@ class SignerProvider : ContentProvider() {
                 }
 
                 "content://$appId.GET_PUBLIC_KEY" -> {
+                    if (selection != "Amber") return null // only accept content provider when it's a bunker request
                     val npub = if (projection != null && projection.isNotEmpty()) IntentUtils.parsePubKey(projection[0]) else null
                     val account = if (npub != null) {
                         LocalPreferences.loadFromEncryptedStorageSync(context!!, npub)

app/src/main/java/com/greenart7c3/nostrsigner/service/EventNotificationConsumer.kt

@@ -302,7 +302,7 @@ class EventNotificationConsumer(private val applicationContext: Context) {
             applicationContext.contentResolver.query(
                 "content://${BuildConfig.APPLICATION_ID}.$type".toUri(),
                 projection,
-                null,
+                "Amber",
                 null,
                 event.pubKey,
             )