Fix initial underlineColorAndroid application in Fabric

[97Fakhreddine]

Summary:

Fixes #57921.

On Android Fabric, underlineColorAndroid can be applied before a TextInput has a background drawable. ReactTextInputManager.setUnderlineColor currently returns in that case, so the initial prop value is lost and is only applied after a later render.

This change moves underline color handling into ReactEditText, where the requested color is retained and reapplied when a background drawable becomes available. When React Native has wrapped the native background in a CompositeBackgroundDrawable, the color filter is applied to its original Android background instead of the wrapper.

A Robolectric regression test covers applying the prop while the background is null and then installing the background drawable.

Changelog:

[ANDROID] [FIXED] - Apply underlineColorAndroid on the initial Fabric render when the TextInput background becomes available later

Test Plan:

• Added testUnderlineColorAppliedWhenBackgroundBecomesAvailable to ReactTextInputPropertyTest.
• git diff --check passes.
• CI: ./gradlew :packages:react-native:ReactAndroid:testDebugUnitTest --tests com.facebook.react.views.textinput.ReactTextInputPropertyTest.testUnderlineColorAppliedWhenBackgroundBecomesAvailable
• Not run locally: the Gradle distribution download was unavailable in the execution environment.