GMA SDK major version update 7.0.0

[LTPhantom]

Description

• Updates GMA Android dependency to 24.9.0
• Updates GMA iOS dependency to 12.14.0
• Uses latest UMP SDK:
  • Android UMP SDK version 4.0.0.
  • iOS UMP SDK version 3.1.0.

Related Issues

• Resolves Native ad template body text squishing call-to-action button #1243
• Resolves Native template ads are cropped when ad contains 3 lines of text #1332
• Resolves There is white padding when Set NativeTemplateStyle mainBackgroundColor to black of dark mode #1357
• Resolves Add support for gradle-9.2.1 #1365
• Resolves Update to Robolectric 4.16 #1366

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• My PR includes unit or integration tests for all changed/updated/fixed behaviors (See Contributor Guide).
• All existing and new tests are passing.
• I updated/added relevant documentation (doc comments with ///).
• The analyzer (flutter analyze) does not report any problems on my PR.
• I read and followed the Flutter Style Guide.
• I signed the CLA.
• I am willing to follow-up on review comments in a timely manner.

Breaking Change

Does your PR require plugin users to manually update their apps to accommodate your change?

• Yes, this is a breaking change (please indicate a breaking change in CHANGELOG.md and increment major revision).
• No, this is not a breaking change.

[ycv005]

Can we consider this comment- 43b619f#r172727565