Build the Android sample app on JDK 17 (#776)

Seems that this works now, so might as well run it on CI. The JarInfer
tasks still don't work on JDK 17 due to a WALA issue; I'll see if I can
work on that.

.github/workflows/continuous-integration.yml

@@ -66,7 +66,7 @@ jobs:
           ORG_GRADLE_PROJECT_epApiVersion: ${{ matrix.epVersion }}
         uses: gradle/gradle-build-action@v2
         with:
-          arguments: build -x :sample-app:build -x :jar-infer:jar-infer-lib:build -x :jar-infer:nullaway-integration-test:build -x :jar-infer:test-java-lib-jarinfer:build
+          arguments: build -x :jar-infer:jar-infer-lib:build -x :jar-infer:nullaway-integration-test:build -x :jar-infer:test-java-lib-jarinfer:build
         if: matrix.java == '17'
       - name: Report jacoco coverage
         uses: gradle/gradle-build-action@v2