[Android] Bump min SDK to 24

.github/workflows/android.yaml

@@ -225,15 +225,15 @@ jobs:
         path: |
           ~/.android/avd/*
           ~/.android/adb*
-        key: ${{ runner.os }}-avd-api-21-2
+        key: ${{ runner.os }}-avd-api-24-2
     - name: Create AVD and generate snapshot for caching
       if: steps.avd-cache.outputs.cache-hit != 'true'
       timeout-minutes: 30
       uses: reactivecircus/android-emulator-runner@62dbb605bba737720e10b196cb4220d374026a6d # pin@v2.33
       with:
         channel: stable
         force-avd-creation: false
-        api-level: 21
+        api-level: 24
         target: default
         ram-size: 2048M
         arch: x86_64
@@ -248,12 +248,15 @@ jobs:
     - name: Check Licenses for modules
       working-directory: ./platform/jvm
       run: ./gradlew replay:checkLicense common:checkLicense # capture:checkLicense doesn't work at the moment
+    - name: Build Microbenchmark target
+      working-directory: ./platform/jvm
+      run: ./gradlew microbenchmark:assembleAndroidTest
     - name: Instrumentation Tests
       uses: reactivecircus/android-emulator-runner@62dbb605bba737720e10b196cb4220d374026a6d # pin@v2.33
       with:
         channel: stable
         force-avd-creation: false
-        api-level: 21
+        api-level: 24
         target: default
         ram-size: 2048M
         arch: x86_64
@@ -268,7 +271,7 @@ jobs:
     runs-on: ubuntu-latest-8-cores
     strategy:
       matrix:
-        api-level: [21, 35]
+        api-level: [24, 35]
     steps:
       # Checkout repo to Github Actions runner
       - name: Checkout