Clean up Android testing devices (#1880)

* Fix FTL Galaxy S25 Ultra (pa3q) Android version to 35

Firebase Test Lab only supports Android 35 for the Galaxy S25 Ultra (pa3q),
not Android 36. Using version 36 caused FTL to decline/skip the test run
with exit code 18 (Outcome: Skipped).

Verified using:
gcloud firebase test android models list

* Update FTL emulator matrix to test API 26 and API 35

- Set emulator_ftl_target (baseline) to API 26 (oldest FTL emulator version) and removed the invalid non-ARM Pixel2 model.
- Set emulator_ftl_latest (latest) to API 35 (Android 15) and removed Pixel2.arm since it only supports up to API 33.

* Revert FTL emulator versions to 28/32, keeping Pixel2 (non-arm) removal

Revert the target and latest emulator versions back to their original values of 28 and 32 respectively.
Keep only the removal of the invalid/obsolete Pixel2 (non-arm) device from emulator_ftl_target.

Author: AustinBenoit

scripts/gha/print_matrix_configuration.py

@@ -185,11 +185,10 @@
       {"type": "ftl", "device": "model=rango,version=36"},  # Pixel 10 Pro Fold
       {"type": "ftl", "device": "model=tangorpro,version=33"},  # Pixel Tablet
       {"type": "ftl", "device": "model=gts9wifi,version=34"},  # Galaxy Tab S9
-      {"type": "ftl", "device": "model=pa3q,version=36"},  # Galaxy S25 Ultra
+      {"type": "ftl", "device": "model=pa3q,version=35"},  # Galaxy S25 Ultra
       {"type": "ftl", "device": "model=b6q,version=34"},  # Galaxy Z Flip6
   ],
   "emulator_ftl_target": [
-      {"type": "ftl", "device": "model=Pixel2,version=28"},
       {"type": "ftl", "device": "model=Pixel2.arm,version=28"},
       {"type": "ftl", "device": "model=MediumPhone.arm,version=28"},
       {"type": "ftl", "device": "model=MediumTablet.arm,version=28"},