[CI] Use normal runners instead of large runners for emulator tests

See https://github.blog/changelog/2024-04-02-github-actions-hardware-accelerated-android-virtualization-now-available/

Author: rfc2822

.github/workflows/test-dev.yml

@@ -9,7 +9,7 @@ jobs:
     name: Tests without emulator
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: actions/setup-java@v4
         with:
           distribution: temurin
@@ -22,12 +22,12 @@ jobs:
 
   test_on_emulator:
     name: Tests with emulator
-    runs-on: ubuntu-latest-4-cores
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         api-level: [ 31 ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: actions/setup-java@v4
         with:
           distribution: temurin
@@ -48,4 +48,4 @@ jobs:
           key: avd-${{ hashFiles('lib/build.gradle.kts') }}   # gradle-managed devices are defined there
 
       - name: Run device tests
-        run: ./gradlew --no-daemon virtualCheck
+        run: ./gradlew --no-daemon virtualCheck