Added new UI to select a specific CA certificate

With this change there is no need to wait for all certificates being loaded
anymore (this happens only when the user opens the selection activity).

src/frontends/android/res/layout/profile_detail_view.xml

@@ -91,6 +91,33 @@
             android:layout_height="wrap_content"
             android:text="@string/profile_ca_auto_label" />
 
+        <RelativeLayout
+            android:id="@+id/select_certificate"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:minHeight="?android:attr/listPreferredItemHeight"
+            android:background="?android:attr/selectableItemBackground"
+            android:padding="10dp" >
+
+            <TextView
+                android:id="@+id/select_certificate_title"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:textAppearance="?android:attr/textAppearanceMedium"
+                android:text="@string/profile_ca_select_certificate_label" />
+
+            <TextView
+                android:id="@+id/select_certificate_subtitle"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_below="@id/select_certificate_title"
+                android:layout_alignLeft="@id/select_certificate_title"
+                android:textAppearance="?android:attr/textAppearanceSmall"
+                android:textColor="?android:attr/textColorSecondary"
+                android:text="@string/profile_ca_select_certificate" />
+
+        </RelativeLayout>
+
     </LinearLayout>
 
 </ScrollView>

src/frontends/android/res/values-de/strings.xml

@@ -51,6 +51,8 @@
     <string name="profile_password_hint">(anfordern wenn benötigt)</string>
     <string name="profile_ca_label">CA-Zertifikat:</string>
     <string name="profile_ca_auto_label">Automatisch wählen</string>
+    <string name="profile_ca_select_certificate_label">CA-Zertifikat auswählen</string>
+    <string name="profile_ca_select_certificate">Wählen Sie ein bestimmtes CA-Zertifikat</string>
     <!-- Warnings/Notifications in the details view -->
     <string name="alert_text_no_input_gateway">Bitte geben Sie hier die Gateway-Adresse ein</string>
     <string name="alert_text_no_input_username">Bitte geben Sie hier Ihren Benutzernamen ein</string>

src/frontends/android/res/values/strings.xml

@@ -51,6 +51,8 @@
     <string name="profile_password_hint">(prompt when needed)</string>
     <string name="profile_ca_label">CA certificate:</string>
     <string name="profile_ca_auto_label">Select automatically</string>
+    <string name="profile_ca_select_certificate_label">Select CA certificate</string>
+    <string name="profile_ca_select_certificate">Select a specific CA certificate</string>
     <!-- Warnings/Notifications in the details view -->
     <string name="alert_text_no_input_gateway">Please enter the gateway address here</string>
     <string name="alert_text_no_input_username">Please enter your username here</string>