Disable animations in CTS theme ProgressBar & update ReferenceImageTest.java to androidx

cherry-pick from previous fix to problem of CTS theme ProgressBar not rendering in time causing test failure.
In addition, updated ReferenceImagesTest.java (to androidx so that LOCAL_SDK_VERSION of test_current can be ran.

Bug: 143049967
Change-Id: Iebd5ee02948e7c6f103a7faf575aca3a90b47b4a
Fix: 121330993
Test: atest android.theme.cts.ThemeHostTest#testThemes
Merged-In: Ibfb064a1c6a200a983e1e02df67f4bf82f11946c