refactor(A11yFeedback): Rename AccessibilityMetricsFeatureProvider

The AccessibilityMetricsFeatureProvider currently provides page IDs
derived from component names, primarily for metrics purposes.
However, its functionality should be expanded to also support
feedback needs, not just metrics collection, by returning
appropriate settings enum values.

Bug: 393980229
Test: atest AccessibilityMetricsFeatureProviderGoogleImplTest
Flag: com.android.server.accessibility.enable_low_vision_generic_feedback
Change-Id: I2d64db866010ae5e3c6a9738f92860df3d0b86aa