Can't run tests on arm64 device/emulator

[asmirnov]

Environment

We're having precompiled 32 bit libadblockplus binaries in https://hg.adblockplus.org/libadblockplus-binaries repo for armeabi-v7a and x86. libadblockplus-android module uses it and provides libadblockplus-jni.so that is used by both libadblockplus-android-tests and libadblockplus-webviewapp modules.

However, one can run webviewapp on 64 bit device (arm64) but can't run tests on 64 bit device/emulator with the following error:

java.lang.UnsatisfiedLinkError: dlopen failed: "/data/app/org.adblockplus.libadblockplus.tests.test-1/lib/arm/libadblockplus-jni.so" is 32-bit instead of 64-bit
at java.lang.Runtime.loadLibrary0(Runtime.java:977)
at java.lang.System.loadLibrary(System.java:1530)
at org.adblockplus.libadblockplus.JsEngine.<clinit>(JsEngine.java:29)
at org.adblockplus.libadblockplus.tests.BaseJsTest.setUp(BaseJsTest.java:36)
at org.adblockplus.libadblockplus.tests.FilterEngineGenericTest.setUp(FilterEngineGenericTest.java:97)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:198)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:183)
at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:560)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1939)

How to reproduce

1. attach arm64 device or emulator
2. run any test
3. make sure the test crashes

...

Observed behaviour

crash while loading native library

Expected behaviour

native code is loaded and the tests are running

[asmirnov]

I've tried it in Android Studio 2.1, 2.2.3 and 2.3.2 to exclude IDE issue