Show QR code again

briar-android/src/main/res/layout/fragment_contact_link_exchange.xml

@@ -68,7 +68,7 @@
 			android:drawablePadding="8dp"
 			android:drawableStart="@drawable/ic_qr_code"
 			android:text="@string/scan_qr_code_button"
-			android:visibility="gone"
+			android:visibility="visible"
 			app:layout_constraintEnd_toEndOf="parent"
 			app:layout_constraintHorizontal_bias="0.5"
 			app:layout_constraintStart_toEndOf="@id/pasteButton"
@@ -145,7 +145,7 @@
 			android:drawableStart="@drawable/ic_qr_code"
 			android:drawableTint="@color/briar_button_text_positive"
 			android:text="@string/show_qr_code_button"
-			android:visibility="gone"
+			android:visibility="visible"
 			app:layout_constraintBottom_toBottomOf="@id/copyButton"
 			app:layout_constraintEnd_toEndOf="parent"
 			app:layout_constraintStart_toEndOf="@id/shareButton"

briar-android/src/main/res/values/strings.xml

@@ -156,7 +156,7 @@
 	<string name="contact_name_hint">Give contact a nickname</string>
 	<string name="contact_link_hint">Your contact\'s link</string>
 	<string name="paste_button">Paste</string>
-	<string name="scan_qr_code_button">QR Code</string>
+	<string name="scan_qr_code_button">Scan Code</string>
 	<string name="add_contact_button">Add Contact</string>
 	<string name="copy_button">Copy</string>
 	<string name="share_button">Share</string>