Add beta terms label

res/layout/registration_welcome_activity.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<android.support.constraint.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
     android:background="@color/loki_darkest_gray"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
@@ -26,7 +26,7 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@id/textView"
         app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintBottom_toTopOf="@id/welcome_terms_button"
+        app:layout_constraintBottom_toTopOf="@id/beta_terms_label"
         android:orientation="vertical"
         android:gravity="center">
 
@@ -37,6 +37,21 @@
 
     </LinearLayout>
 
+    <TextView
+        android:id="@+id/beta_terms_label"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="32dp"
+        android:layout_marginEnd="32dp"
+        android:layout_marginBottom="24dp"
+        style="@style/Signal.Text.Body"
+        android:text="@string/activity_landing_beta_terms"
+        android:textColor="@color/white"
+        android:textAlignment="center"
+        app:layout_constraintBottom_toTopOf="@+id/welcome_terms_button"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent" />
+
     <TextView
         android:id="@+id/welcome_terms_button"
         android:layout_width="wrap_content"
@@ -45,6 +60,7 @@
         style="@style/Signal.Text.Body"
         android:text="@string/activity_landing_privacy_policy_button_title"
         android:textColor="@color/signal_primary"
+        android:textAlignment="center"
         app:layout_constraintBottom_toTopOf="@+id/welcome_continue_button"
         app:layout_constraintEnd_toEndOf="@+id/welcome_continue_button"
         app:layout_constraintStart_toStartOf="@+id/welcome_continue_button" />

res/values/strings.xml

@@ -1547,6 +1547,7 @@
     <!-- Landing activity -->
     <string name="activity_landing_title">Loki Messenger</string>
     <string name="activity_landing_permission_dialog_message">Some features of Loki Messenger (such as automatic message backup) require storage access to work.</string>
+    <string name="activity_landing_beta_terms">"Loki Messenger is currently in beta. For development purposes the beta version collects basic usage statistics and crash logs. In addition, the beta version doesn't provide full privacy and shouldn\'t be used to transmit sensitive information."</string>
     <string name="activity_landing_privacy_policy_button_title">Privacy Policy</string>
     <!-- Account details activity -->
     <string name="activity_account_details_title">Create Your Loki Messenger Account</string>