Test recently started flakily failing on the Android GN bot.

https://build.chromium.org/p/chromium.linux/builders/Android%20GN/builds/33856
https://build.chromium.org/p/chromium.linux/builders/Android%20GN/builds/33846

This error was in the logcat....

 814565 86d60:  04-18 18:16:14.639  9951  9951 W dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x416dfba8)
 814566 86d60:  04-18 18:16:14.639  9951  9951 E AndroidRuntime: FATAL EXCEPTION: main
 814567 86d60:  04-18 18:16:14.639  9951  9951 E AndroidRuntime: Process: org.chromium.chrome, PID: 9951
 814568 86d60:  04-18 18:16:14.639  9951  9951 E AndroidRuntime: java.lang.AssertionError
 814569 86d60:  04-18 18:16:14.639  9951  9951 E AndroidRuntime:  at org.chromium.sync.signin.AccountManagerHelper.initializeAccountManagerHelper(AccountManagerHelper.java:98)
 814570 86d60:  04-18 18:16:14.639  9951  9951 E AndroidRuntime:  at org.chromium.chrome.browser.ChromeApplication.onCreate(ChromeApplication.java:224)
 814571 86d60:  04-18 18:16:14.639  9951  9951 E AndroidRuntime:  at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1007)
 814572 86d60:  04-18 18:16:14.639  9951  9951 E AndroidRuntime:  at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4344)
 814573 86d60:  04-18 18:16:14.639  9951  9951 E AndroidRuntime:  at android.app.ActivityThread.access$1500(ActivityThread.java:135)
 814574 86d60:  04-18 18:16:14.639  9951  9951 E AndroidRuntime:  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
 814575 86d60:  04-18 18:16:14.639  9951  9951 E AndroidRuntime:  at android.os.Handler.dispatchMessage(Handler.java:102)
 814576 86d60:  04-18 18:16:14.639  9951  9951 E AndroidRuntime:  at android.os.Looper.loop(Looper.java:136)
 814577 86d60:  04-18 18:16:14.639  9951  9951 E AndroidRuntime:  at android.app.ActivityThread.main(ActivityThread.java:5017)
 814578 86d60:  04-18 18:16:14.639  9951  9951 E AndroidRuntime:  at java.lang.reflect.Method.invokeNative(Native Method)
 814579 86d60:  04-18 18:16:14.639  9951  9951 E AndroidRuntime:  at java.lang.reflect.Method.invoke(Method.java:515)
 814580 86d60:  04-18 18:16:14.639  9951  9951 E AndroidRuntime:  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
 814581 86d60:  04-18 18:16:14.639  9951  9951 E AndroidRuntime:  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
 814582 86d60:  04-18 18:16:14.639  9951  9951 E AndroidRuntime:  at dalvik.system.NativeStart.main(Native Method)