[ImsMedia] Retained notifyMediaInactivity api to avoid build error

- this change has to be reverted once Lassen provides
implementation of new MediaQualityStatus apis

Bug: 264356481
Test: build (m -j64)
      atest ImsStackJavaTests
Change-Id: Iff6da2975c069d6cf17aa5dd940a2e7721f29af2
1 file changed