[android] disable leak canary during instrumentation tests

platform/android/MapboxGLAndroidSDKTestApp/build.gradle

@@ -9,7 +9,7 @@ android {
         targetSdkVersion androidVersions.targetSdkVersion
         versionCode 13
         versionName "6.0.0"
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner "com.mapbox.mapboxsdk.InstrumentationRunner"
     }
 
     compileOptions {

platform/android/MapboxGLAndroidSDKTestApp/src/androidTest/java/com/mapbox/mapboxsdk/InstrumentationApplication.kt

@@ -0,0 +1,10 @@
+package com.mapbox.mapboxsdk
+
+import com.mapbox.mapboxsdk.testapp.MapboxApplication
+
+class InstrumentationApplication : MapboxApplication() {
+  override fun initializeLeakCanary(): Boolean {
+    // do not initialize leak canary during instrumentation tests
+    return true
+  }
+}

platform/android/MapboxGLAndroidSDKTestApp/src/androidTest/java/com/mapbox/mapboxsdk/InstrumentationRunner.kt

@@ -0,0 +1,11 @@
+package com.mapbox.mapboxsdk
+
+import android.app.Application
+import android.content.Context
+import android.support.test.runner.AndroidJUnitRunner
+
+class InstrumentationRunner : AndroidJUnitRunner() {
+  override fun newApplication(cl: ClassLoader?, className: String?, context: Context?): Application {
+    return super.newApplication(cl, InstrumentationApplication::class.java.name, context)
+  }
+}

platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/MapboxApplication.java

@@ -40,7 +40,7 @@ public class MapboxApplication extends Application {
     initializeMapbox();
   }
 
-  private boolean initializeLeakCanary() {
+  protected boolean initializeLeakCanary() {
     if (LeakCanary.isInAnalyzerProcess(this)) {
       // This process is dedicated to LeakCanary for heap analysis.
       // You should not init your app in this process.