[release/6.0] [Android] Fix path to ping on Android API 21-27

[github-actions]

Backport of #79076 to release/6.0

/cc @simonrozsival

Customer Impact

This issue affects only a subset of customers on older Android versions. The System.Net.NetworkInformation.Ping class didn't work in apps running on these systems.

Testing

Tested locally on Android emulators with APIs 21-27.

Risk

Low.

[ghost]

Tagging subscribers to this area: @dotnet/ncl
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Backport of #79076 to release/6.0

/cc @simonrozsival

Customer Impact

Testing

Risk

IMPORTANT: Is this backport for a servicing release? If so and this change touches code that ships in a NuGet package, please make certain that you have added any necessary package authoring and gotten it explicitly reviewed.

Author:	github-actions[bot]
Assignees:	-
Labels:	area-System.Net
Milestone:	-

[ghost]

Tagging subscribers to 'arch-android': @steveisok, @akoeplinger
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Backport of #79076 to release/6.0

/cc @simonrozsival

Customer Impact

Testing

Risk

IMPORTANT: Is this backport for a servicing release? If so and this change touches code that ships in a NuGet package, please make certain that you have added any necessary package authoring and gotten it explicitly reviewed.

Author:	github-actions[bot]
Assignees:	-
Labels:	area-System.Net, os-android
Milestone:	-

[carlossanlop]

@simonrozsival when this is ready, please add the servicing-consider label and send an email to Tactics requesting approval.

Can you also please verify if the CI failures are related or not?

[carlossanlop]

@simonrozsival have you sent the email to Tactics requesting approval? I can't find it.

Friday Jan 13th EOD is the cut-off date for Code Complete for the February release. We want to try to merge all backports in advance so that we have time to monitor the base branch for any unexpected breaks. Reminder that next weekend is a long weekend (Monday is a holiday in the US).

[simonrozsival]

@carlossanlop I've sent the email today.

CI failures are unrelated to this PR (#80029, #79858, #78778)

[carlossanlop]

Approved by Tactics (6.0.14).
Signed off by area owner.
No OOB changes needed (Android code).
CI failures investigated, they're unrelated.
Ready to merge.