Remove dropbox dependency from free flavor

Author: fynngodau

app/build.gradle

@@ -89,7 +89,7 @@ dependencies {
     compile 'com.github.PhilJay:MPAndroidChart:v2.2.4' // Charts
     compile 'com.jakewharton.timber:timber:4.1.2' // Advanced logging tool
     compile 'com.android.support.constraint:constraint-layout:1.1.3'
-    compile 'com.dropbox.core:dropbox-core-sdk:3.0.5' // Dropbox Core API
+    proprietaryCompile 'com.dropbox.core:dropbox-core-sdk:3.0.5' // Dropbox Core API
 
     testCompile 'junit:junit:4.12'
     testCompile 'org.mockito:mockito-core:2.8.9'

app/src/free/java/com/blogspot/e_kanivets/moneytracker/activity/external/BackupActivity.java

@@ -0,0 +1,16 @@
+package com.blogspot.e_kanivets.moneytracker.activity.external;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+
+/**
+ * This class does nothing in the free flavor, but it is a lot easier to
+ * have it exist than to have it not exist.
+ */
+public class BackupActivity extends Activity {
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+    }
+}

app/src/free/java/com/blogspot/e_kanivets/moneytracker/controller/backup/BackupController.java

@@ -0,0 +1,10 @@
+package com.blogspot.e_kanivets.moneytracker.controller.backup;
+
+import com.blogspot.e_kanivets.moneytracker.controller.FormatController;
+
+/** This class does nothing instead of Dropbox support. */
+public class BackupController {
+    public BackupController(FormatController formatController, String dataDir) {
+
+    }
+}

app/src/free/res/menu/menu_nav_drawer.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+    <group android:id="@+id/group_1">
+        <item
+            android:id="@+id/nav_accounts"
+            android:icon="@drawable/ic_accounts"
+            android:title="@string/title_accounts" />
+        <item
+            android:id="@+id/nav_rates"
+            android:icon="@drawable/ic_exchange_rates"
+            android:title="@string/title_exchange_rates" />
+        <item
+            android:id="@+id/nav_charts"
+            android:icon="@drawable/ic_charts"
+            android:title="@string/title_charts" />
+    </group>
+
+    <group android:id="@+id/group_2">
+        <item
+            android:id="@+id/nav_backup"
+            android:icon="@drawable/ic_backup"
+            android:title="@string/backup_data"
+            android:visible="false" />
+        <item
+            android:id="@+id/nav_import_export"
+            android:icon="@drawable/ic_import_export"
+            android:title="@string/title_import_export" />
+    </group>
+
+    <group android:id="@+id/group_3">
+        <item
+            android:id="@+id/nav_settings"
+            android:icon="@drawable/ic_settings"
+            android:title="@string/settings" />
+    </group>
+</menu>