Update the E2eTestActivity manifest so that it handles configuration
changes itself, and just ignore them. This prevents the activity from
being recreated, which destroys the test surface.

Bug: 206342802
Test: tast run octopus arc.VideoDecodeAccelPerf.*
Change-Id: Ie48cf0650424c9f641c2770b3127f75e6407c01d
(cherry picked from commit 0127892edd2d5f62623e14db20b1a023850e0667)