Add/remove attachments in new email, list attachments in view email

app/src/main/res/layout/fragment_new_email.xml

@@ -68,6 +68,12 @@
             android:ems="10"
             android:hint="@string/compose_email"
             android:inputType="textMultiLine"/>
+
+        <LinearLayout
+            android:id="@+id/attachments"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"/>
     </LinearLayout>
 
 </ScrollView>

app/src/main/res/layout/fragment_view_email.xml

@@ -221,6 +221,12 @@
             android:paddingRight="@dimen/activity_horizontal_margin"
             android:paddingTop="@dimen/activity_vertical_margin"
             android:textAppearance="@style/TextAppearance.AppCompat.Primary"/>
+
+        <LinearLayout
+            android:id="@+id/attachments"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"/>
     </LinearLayout>
 
 </ScrollView>

app/src/main/res/menu/new_email.xml

@@ -2,6 +2,12 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:i2pandroid="http://schemas.android.com/apk/res-auto" >
 
+    <item
+        android:id="@+id/action_attach_file"
+        android:icon="@drawable/ic_attach_file_white_24dp"
+        android:title="@string/action_attach_file"
+        i2pandroid:showAsAction="ifRoom"/>
+
     <item
         android:id="@+id/action_send_email"
         android:icon="@drawable/ic_send_white_24dp"

app/src/main/res/values/strings.xml

@@ -38,6 +38,11 @@
     <string name="log_out">Log out</string>
     <string name="touch_lock_to_log_in">Touch the lock icon to log in.</string>
     <string name="action_new_email">New email</string>
+    <string name="action_attach_file">Attach file</string>
+    <string name="select_attachment">Select a file to attach</string>
+    <string name="n_bytes" translatable="false">%s B</string>
+    <string name="n_kilobytes" translatable="false">%s KB</string>
+    <string name="n_megabytes" translatable="false">%s MB</string>
     <string name="action_send_email">Send email</string>
     <string name="action_start_bote">Connect to network</string>
     <string name="action_stop_bote">Disconnect from network</string>