Revert "Create Public API in AccessibilityManager to expose Audi..."

Revert "Update AudioDescription read/write from Settings.Secure,..."

Revert "Add CTS tests for AccessibilityManager.isAudioDescriptio..."

Revert submission 15617076-AudioDescriptionPublicAPI

Reason for revert: Raise Memorytest failures: b/200728759, b/200746876.
Reverted Changes:
Ic11e0bc4f:Add CTS tests for AccessibilityManager.isAudioDesc...
I8f3908513:Update AudioDescription read/write from Settings.S...
Iecf006bc8:Create Public API in AccessibilityManager to expos...

Bug: 200728759
Bug: 200746876
Change-Id: Ic5b63bd5e9196f24638d36c05c3fa209c1afbcec