Added content descriptions for POP3

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

@@ -104,6 +104,7 @@
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_marginTop="12dp"
+                    android:labelFor="@+id/etHost"
                     android:text="@string/title_host"
                     android:textAppearance="@style/TextAppearance.AppCompat.Medium"
                     android:textColor="?android:textColorPrimary"
@@ -221,6 +222,7 @@
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_marginTop="12dp"
+                    android:labelFor="@+id/etPort"
                     android:text="@string/title_port"
                     android:textAppearance="@style/TextAppearance.AppCompat.Medium"
                     android:textColor="?android:textColorPrimary"
@@ -271,6 +273,7 @@
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_marginTop="12dp"
+                    android:labelFor="@+id/tilPassword"
                     android:text="@string/title_password"
                     android:textAppearance="@style/TextAppearance.AppCompat.Medium"
                     android:textColor="?android:textColorPrimary"
@@ -656,7 +659,6 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginTop="24dp"
-            android:labelFor="@+id/etMax"
             android:text="@string/title_max_messages"
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
             app:layout_constraintStart_toStartOf="parent"
@@ -667,7 +669,6 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginTop="6dp"
-            android:labelFor="@+id/etMax"
             android:text="@string/title_max_messages_keep"
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
             android:textStyle="italic"