Add support for User Messaging Platform SDK on Android

[jonsimantov]

Description

Provide details of the change, and generalize the change in the PR title above.

Android implementation of UMP, mostly via a ConsentInfoHelper class.

Also adds OperationInProgress errors to iOS SDK.

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Testing

Describe how you've tested these changes. Link any manually triggered Integration tests or CPP binary SDK Packaging Github Action workflows, if applicable.

Integration tests running in this PR, plus manual testing on Android emulator.

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Type of Change

Place an x the applicable box:

• Bug fix. Add the issue # below if applicable.
• New feature. A non-breaking change which adds functionality.
• Other, such as a build process or documentation change.

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Notes

• Bug fixes and feature changes require an update to the Release Notes section of release_build_files/readme.md.
• Read the contribution guidelines CONTRIBUTING.md.
• Changes to the public API require an internal API review. If you'd like to help us make Firebase APIs better, please propose your change in a feature request so that we can discuss it together.

[github-actions]

❌  Integration test FAILED

Requested by @jonsimantov on commit 92eb594
Last updated: Thu Sep 14 14:48 PDT 2023
View integration test log & download artifacts

Failures	Configs
app_check	[BUILD] [ERROR] [Android] [1/3 os: windows]
firestore	[TEST] [FLAKINESS] [Android] [1/3 os: macos] [1/2 android_device: android_target] (1 failed tests)   QueryTest.TestQueriesCanUseNotEqualFiltersWithDocIds [TEST] [FLAKINESS] [iOS] [macos] [1/2 ios_device: ios_target] (1 failed tests)   NumericTransformsTest.IncrementDeleteIncrementInABatch

Add flaky tests to go/fpl-cpp-flake-tracker