Crash occurs when entering a Bluetooth broadcast password

BT crashes when entering a password longer than 16 characters.
Limit the password length to 16 characters.

Fixes: 292053940
Test: Manual
Change-Id: I1ed2cfc33c3b0dbdcf2a9c865b748b6376bce1bc

res/layout/bluetooth_find_broadcast_password_dialog.xml

@@ -31,6 +31,7 @@
         android:id="@+id/broadcast_edit_text"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:maxLength="16"
         android:minHeight="48dp"
         android:textAlignment="viewStart"/>
     <TextView