Move app initialization out of EmailListActivity so it can be used elsewhere

app/src/main/java/i2p/bote/android/InitActivities.java

@@ -0,0 +1,27 @@
+package i2p.bote.android;
+
+import android.content.Context;
+
+class InitActivities {
+    private final Context ctx;
+    private final String myDir;
+
+    public InitActivities(Context c) {
+        ctx = c;
+        // This needs to be changed so that we can have an alternative place
+        myDir = c.getFilesDir().getAbsolutePath();
+    }
+
+    void initialize() {
+        // Don't initialize twice
+        if (System.getProperty("i2pbote.initialized", "false").equals("true"))
+            return;
+
+        // Set up the locations so settings can find them
+        System.setProperty("i2p.dir.base", myDir);
+        System.setProperty("i2p.dir.config", myDir);
+        System.setProperty("wrapper.logfile", myDir + "/wrapper.log");
+
+        System.setProperty("i2pbote.initialized", "true");
+    }
+}