Crash related to Brave News on NTP

[SergeyZhukovsky]

I found that crash in GPS on a stable channel 1.46.x. https://github.com/brave/brave-core/blob/1.46.x/android/java/org/chromium/chrome/browser/ntp/BraveNewTabPageLayout.java#L293. Perhaps a check on activity has to be done inside the handler and not outside?

Crash stack:

Exception java.lang.NullPointerException: Attempt to invoke virtual method 'org.chromium.chrome.browser.tab.Tab org.chromium.chrome.browser.app.ChromeActivity.E3()' on a null object reference
  at org.chromium.chrome.browser.ntp.BraveNewTabPageLayout.lambda$onAttachedToWindow$0 (BraveNewTabPageLayout.java:293)
  at org.chromium.chrome.browser.ntp.BraveNewTabPageLayout$$InternalSyntheticLambda$1$48595ce0a6477504149fb7e91db1bae31bc3c267dc5e1c3a14d4f7f21f0313a6$0.run$bridge (BraveNewTabPageLayout.java:173)
  at android.os.Handler.handleCallback (Handler.java:883)
  at android.os.Handler.dispatchMessage (Handler.java:100)
  at android.os.Looper.loop (Looper.java:237)
  at android.app.ActivityThread.main (ActivityThread.java:7811)
  at java.lang.reflect.Method.invoke (Method.java)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:493)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1068)

STR/Cases:

As discussed during the weekly Android planning/triage meeting, a quick check should be sufficient enough:

• ensure that the modal/card is appearing via NTP
• ensure that you can opt-in into Brave News
• ensure that you can tap/open articles within the news feed without any issues
• add/remove a few sources and ensure nothing obvious has regressed

[kjozwiak]

The above requires 1.47.171 or higher for 1.47.x verification 👍

[Uni-verse]

Verified on Samsung Galaxy S21 using version:

Brave	1.47.171 Chromium: 109.0.5414.87 (Official Build) (64-bit) 
Revision	2dc18eb511c56e012081b4abc9e38c81c885f7d4-refs/branch-heads/5414@{#1241}
OS	Android 13; Build/TP1A.220624.014

• Verified user can opt into brave news and load content in other tabs.
• Verified the following use cases for brave news.
• ensure that the modal/card is appearing via NTP
• ensure that you can opt-in into Brave News
• ensure that you can opt-in into Brave News via settings menu
• ensure that you can tap/open articles within the news feed without any issues
• add/remove a few sources and ensure nothing obvious has regressed
• Brave news feed on upgraded profile

Example	Example	Example	Example