donation: add util method to open donate web page

GitLab: #1363
GitLab: jami-project#1330

Change-Id: Icb2aaa0aafad89acbbe7bb4ba2bc755b35685984

jami-android/app/src/main/java/cx/ring/utils/ActionHelper.kt

@@ -44,6 +44,12 @@ object ActionHelper {
     fun View.setPadding(padding: Padding) =
         setPadding(padding.pixelsLeft, padding.pixelsTop, padding.pixelsRight, padding.pixelsBottom)
 
+    fun openJamiDonateWebPage(context: Context) {
+        context.startActivity(
+            Intent(Intent.ACTION_VIEW, android.net.Uri.parse(context.getString(R.string.donation_url)))
+        )
+    }
+
     /**
      * Share the given username with the system share intent.
      * @param context the context

jami-android/app/src/main/res/values/strings.xml

@@ -471,5 +471,8 @@ along with this program; if not, write to the Free Software
     <string name="donation_card_description">If you enjoy using Jami and believe in our mission, would you make a donation?</string>
     <string name="donation_card_not_now">Not now</string>
     <string name="donation_donate">Donate</string>
+    <string name="donation_setting_title">Donation reminder</string>
+    <string name="donation_setting_description">Enable the donation reminder</string>
+    <string name="donation_url" translatable="false">https://crowdfunding.lfx.linuxfoundation.org/projects/jami-a-gnu-package</string>
 
 </resources>