Fix: Show when scanned QRs are invalid addresses.

The UI was not visible on screen due to minor typo.

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

@@ -154,7 +154,7 @@
     <TextView
         android:id="@+id/text_scan_error"
         android:layout_width="0dp"
-        android:layout_height="0dp"
+        android:layout_height="wrap_content"
         android:layout_marginTop="32dp"
         android:ellipsize="end"
         android:fontFamily="@font/inconsolata"

app/src/main/res/values/strings.xml

@@ -87,7 +87,7 @@
     <string name="scan_address_title" tools:ignore="MissingTranslation">@string/translated_send_scanqr</string>
 
     <!-- Screen: Scan -->
-    <string name="scan_invalid_address">"Invalid Zcash %1$s address:\n%2$s"</string>
+    <string name="scan_invalid_address">"Invalid Zcash %1$s address:\n\n%2$s"</string>
 
     <!-- Screen: Send Flow -->
     <string name="send_address_hint" tools:ignore="MissingTranslation">@string/translated_label_to</string>