test(ci, android): only run one emulator test at once

the idea of having an exercise of android emulator at our lowest
supported API is temping, but it has not been stable in practice

.github/workflows/tests_e2e_android.yml

@@ -38,7 +38,8 @@ jobs:
         # 23-25, 28-29 appears to work locally but fails in CI
         # 26 does not support performance tracing due to hardware acceleration bugs
         # min-possible + max-possible skew looks like 29 and 34 then
-        api-level: [30, 34]
+        # running anything below 34 fails at the moment though, so using only it for now
+        api-level: [34]
         arch: [x86_64]
         target: [google_apis]
         # This is useful for benchmarking, do 0, 1, 2, etc (up to 256 max job-per-matrix limit) for averages