Adjust LogAccessDialog themeing for TV

The issues with the LogAccessDialogActivity dialog on TV were:
- White text on white background (now using default background instead
  of ?attr/colorSurface)
- The buttons had no focused state (now using default TV dialog button
  style)

Bug: 228001277
Test: Manual, on adt3 and phone emulator in light & dark mode
Change-Id: I8039183464ff5e13fcf77f146c56c43f6ee46f6a