Fixed ExternalAppIntentProvider

[grzesiek2010]

Closes #6246

Why is this the best possible solution? Were any other approaches considered?

There is nothing to discuss here as it just fixes a small bug.

How does this change affect users? Describe intentional changes to behavior and behavior that could have accidentally been affected by code changes. In other words, what are the regression risks?

Please test starting external apps ideally with parameters like the counter app with increment/autoincrement. Nothing else than that (reading package names and parameters) can be affected by this change.

Do we need any specific form for testing your changes? If so, please attach one.

No.

Does this change require updates to documentation? If so, please file an issue here and include the link below.

No.

Before submitting this PR, please make sure you have:

• added or modified tests for any new or changed behavior
• run ./gradlew connectedAndroidTest (or ./gradlew testLab) and confirmed all checks still pass
• added a comment above any new strings describing it for translators
• added any new strings with date formatting to DateFormatsTest
• verified that any code or assets from external sources are properly credited in comments and/or in the about file.
• verified that any new UI elements use theme colors. UI Components Style guidelines

[srujner]

Tested with Success!
Verified on device with Android 13
Verified cases:

• Issue Counter app - question increment set to true doesn't open the app #6246 is no longer reproducing;
• Regression check on other external apps;
• Regression check on Counter app;
• Minimize the app, rotate the screen;
• Light and Dark mode;
• Don't keep activities enabled/disabled

[WKobus]

Tested with Success!
Verified on device with Android 14