To start emitting OOUI server-side widgets, first one has to select the target theme. For our test purposes, the BlankTheme suffices. Follow-up to 620c556c2c. Bug: T359166 Change-Id: I667b8c45cf22a1dd97814d7d85b208243d83d59a
620c556c2c
Bug: T361031 Change-Id: I04aee7b96aa0fcb18f5ce84f08c35ad11b313349