Update sound dose strings

Also in order to use the notification string for 5X dose removed the
dialog warning and only showing the notification as defined by UX.
UX doc for reference: https://docs.google.com/document/d/16mceIU3kcPBE0VaWYt3OWrpG7HsLDB5j1Pa_CX0Pi7Y/

Test: atest VolumeDialogImplTest CsdWarningDialogTest
Test: atest GtsInteractiveAudioTestCases -- --module-arg GtsInteractiveAudioTestCases:instrumentation-arg:ENABLE_MANUAL:=true
Bug: 244633303
Change-Id: I7efcb5b8d3c059d04de7f8812232f8383a86cff6