Remove Pixel 4 target from CI test workflow (#16228)

Pixel 4 is quite outdated and not on the focused targets right now.
Remove it from the tests to reduce hardware maintenance.

.github/workflows/build_and_test_android.yml

diff --git a/.github/workflows/build_and_test_android.yml b/.github/workflows/build_and_test_android.yml
index bf7d312..ba0c93a 100644
--- a/.github/workflows/build_and_test_android.yml
+++ b/.github/workflows/build_and_test_android.yml
@@ -111,10 +111,6 @@
     strategy:
       matrix:
         target:
-          # Pixel 4 ships an old Adreno GPU driver. There are quite a few bugs
-          # triggered by our tests. Disable running tests entirely on Pixel 4.
-          - device-name: pixel-4
-            label-exclude: "vulkan"
           - device-name: pixel-6-pro
             label-exclude: "^requires-gpu"
           - device-name: moto-edge-x30