Expose card info/graph methods

To enable krmanik#23

Also requires ankidroid/Anki-Android-Backend@4c3eea4
or similar

AnkiDroid/src/main/java/com/ichi2/libanki/CollectionV16.kt

@@ -116,4 +116,9 @@ class CollectionV16(
         task?.doProgress(cardIdsList)
         return cardIdsList
     }
+
+    /** Takes raw input from TypeScript frontend and returns suitable translations. */
+    fun i18nResourcesRaw(input: ByteArray): ByteArray {
+        return backend.i18nResourcesRaw(input)
+    }
 }

AnkiDroid/src/main/java/com/ichi2/libanki/stats/BackendStats.kt

@@ -0,0 +1,40 @@
+/***************************************************************************************
+ * Copyright (c) 2012 Ankitects Pty Ltd <http://apps.ankiweb.net>                       *
+ *                                                                                      *
+ * This program is free software; you can redistribute it and/or modify it under        *
+ * the terms of the GNU General Public License as published by the Free Software        *
+ * Foundation; either version 3 of the License, or (at your option) any later           *
+ * version.                                                                             *
+ *                                                                                      *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY      *
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A      *
+ * PARTICULAR PURPOSE. See the GNU General Public License for more details.             *
+ *                                                                                      *
+ * You should have received a copy of the GNU General Public License along with         *
+ * this program.  If not, see <http://www.gnu.org/licenses/>.                           *
+ ****************************************************************************************/
+
+package com.ichi2.libanki.stats
+
+// These take and return bytes that the frontend TypeScript code will encode/decode.
+
+import com.ichi2.libanki.CollectionV16
+
+fun CollectionV16.cardStatsRaw(input: ByteArray): ByteArray {
+    return backend.cardStatsRaw(input)
+}
+
+fun CollectionV16.graphsRaw(input: ByteArray): ByteArray {
+    return backend.graphsRaw(input)
+}
+
+fun CollectionV16.getGraphPreferencesRaw(): ByteArray {
+    val prefs = backend.getGraphPreferences().toBuilder()
+        .setBrowserLinksSupported(false)
+        .build()
+    return prefs.toByteArray()
+}
+
+fun CollectionV16.setGraphPreferencesRaw(input: ByteArray) {
+    backend.setGraphPreferencesRaw(input)
+}