make io.grpc.testing.integration.Http2OkHttpTest pass on ARM

[jtattermusch]

(As discussed offline)
Currently concrypt doesn't offer an ARM version of the native components, so running Http2OkHttpTest ends up with a failure when ran on an ARM machine (which pollutes the otherwise green test results).

> Task :grpc-interop-testing:test
[jetty-alpn-agent][ warn] Could not parse java.version: 11.0.9.1
[jetty-alpn-agent][ warn] Could not find a matching alpn-boot jar for Java version: 11.0.9.1

io.grpc.testing.integration.Http2OkHttpTest > classMethod FAILED
    java.lang.RuntimeException: Could not create Conscrypt provider
        at io.grpc.internal.testing.TestUtils.installConscryptIfAvailable(TestUtils.java:198)
        at io.grpc.testing.integration.Http2OkHttpTest.loadConscrypt(Http2OkHttpTest.java:66)

        Caused by:
        java.lang.reflect.InvocationTargetException
            at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
            at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
            at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
            at java.base/java.lang.reflect.Method.invoke(Method.java:566)
            at io.grpc.internal.ConscryptLoader.newProvider(ConscryptLoader.java:78)
            at io.grpc.internal.testing.TestUtils.installConscryptIfAvailable(TestUtils.java:189)
            ... 1 more

            Caused by:
            java.lang.UnsatisfiedLinkError: no conscrypt_openjdk_jni-linux-aarch_64 in java.library.path: [/usr/java/packages/lib, /usr/lib/aarch64-linux-gnu/jni, /lib/aarch64-linux-gnu, /usr/lib/aarch64-linux-gnu, /usr/lib/jni, /lib, /usr/lib]
                at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2670)
                at java.base/java.lang.Runtime.loadLibrary0(Runtime.java:830)
                at java.base/java.lang.System.loadLibrary(System.java:1873)
                at org.conscrypt.NativeLibraryUtil.loadLibrary(NativeLibraryUtil.java:54)
                at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
                at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                at java.base/java.lang.reflect.Method.invoke(Method.java:566)
                at org.conscrypt.NativeLibraryLoader$1.run(NativeLibraryLoader.java:297)
                at org.conscrypt.NativeLibraryLoader$1.run(NativeLibraryLoader.java:289)
                at java.base/java.security.AccessController.doPrivileged(Native Method)
                at org.conscrypt.NativeLibraryLoader.loadLibraryFromHelperClassloader(NativeLibraryLoader.java:289)
                at org.conscrypt.NativeLibraryLoader.loadLibrary(NativeLibraryLoader.java:262)
                at org.conscrypt.NativeLibraryLoader.load(NativeLibraryLoader.java:162)
                at org.conscrypt.NativeLibraryLoader.loadFirstAvailable(NativeLibraryLoader.java:106)
                at org.conscrypt.NativeCryptoJni.init(NativeCryptoJni.java:50)
                at org.conscrypt.NativeCrypto.<clinit>(NativeCrypto.java:64)
                at org.conscrypt.Conscrypt.checkAvailability(Conscrypt.java:119)
                at org.conscrypt.Conscrypt.newProvider(Conscrypt.java:133)
                ... 7 more

328 tests completed, 1 failed, 29 skipped

[jtattermusch]

CC @ejona86

[jtattermusch]

qq: could this negatively affect something when testing on android?

[ejona86]

This method isn't used on Android. Android Conscrypt has to be set up quite different ways.