fix: login with Proton

Author: cquintana92

SimpleLogin/app/src/main/AndroidManifest.xml

@@ -26,7 +26,7 @@
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
-        android:taskAffinity=""
+        android:taskAffinity="io.simplelogin.android"
         android:theme="@style/AppTheme">
 
         <activity android:name=".module.startup.StartupActivity"
@@ -89,13 +89,13 @@
                     />
             </intent-filter>
         </activity>
-        <activity android:name=".module.login.VerificationActivity" android:launchMode="singleInstance" />
-        <activity android:name=".module.login.SignUpActivity" android:launchMode="singleInstance" />
-        <activity android:name=".module.login.AboutActivity" android:launchMode="singleInstance" />
+        <activity android:name=".module.login.VerificationActivity" android:launchMode="singleTask" />
+        <activity android:name=".module.login.SignUpActivity" android:launchMode="singleTask" />
+        <activity android:name=".module.login.AboutActivity" android:launchMode="singleTask" />
 
         <!--ShareActivity-->
         <activity android:name=".module.share.ShareActivity"
-            android:launchMode="singleInstance"
+            android:launchMode="singleTask"
             android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.SEND" />