Add editor_upload_media_paused analytics event

[derekblank]

When a device is offline and media uploads are ongoing, track a "paused" analytics event.

Resolves:

• Add EDITOR_UPLOAD_MEDIA_PAUSED analytics event gutenberg-mobile#6516

To test:

1. Create a post and upload an image
2. Turn off network connectivity (via airplane mode or similar)
3. Observe that paused event fires in addition to the failure event

Regression Notes

1. Potential unintended areas of impact
   Analytics events

2. What I did to test those areas of impact (or what existing automated tests I relied on)
   Manual testing in Tracks

3. What automated tests I added (or what prevented me from doing so)
   N/A (analytics)

PR submission checklist:

• I have completed the Regression Notes.
• I have considered adding unit tests for my changes.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

UI Changes testing checklist:

• Portrait and landscape orientations.
• Light and dark modes.
• Fonts: Larger, smaller and bold text.
• High contrast.
• VoiceOver.
• Languages with large words or with letters/accents not frequently used in English.
• Right-to-left languages. (Even if translation isn’t complete, formatting should still respect the right-to-left layout)
• iPhone and iPad.
• Multi-tasking: Split view and Slide over. (iPad)

[derekblank]

TODO:

• Connect WPAnalyticsStatEditorUploadMediaPaused event to bypass the failed state, likely within this block:

WordPress-iOS/WordPress/Classes/Services/MediaService.m

Lines 167 to 175 in d267ef7

	- (void)trackUploadError:(NSError *)error
	blog:(Blog *)blog
	{
	if (error.code == NSURLErrorCancelled) {
	[WPAppAnalytics track:WPAnalyticsStatMediaServiceUploadCanceled withBlog:blog];
	} else {
	[WPAppAnalytics track:WPAnalyticsStatMediaServiceUploadFailed error:error withBlogID:blog.dotComID];
	}
	}

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress Alpha by scanning the QR code below to install the corresponding build.

	App Name	WordPress Alpha
	Configuration	Release-Alpha
	Build Number	pr22369-873a4b5
	Version	24.0
	Bundle ID	org.wordpress.alpha
	Commit	873a4b5
	App Center Build	WPiOS - One-Offs #8429

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack Alpha by scanning the QR code below to install the corresponding build.

	App Name	Jetpack Alpha
	Configuration	Release-Alpha
	Build Number	pr22369-873a4b5
	Version	24.0
	Bundle ID	com.jetpack.alpha
	Commit	873a4b5
	App Center Build	jetpack-installable-builds #7452

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[dcalhoun]

Recreating to make review easier.