audioflinger: Fix for removing noise while resuming playback after pause

-Issue: While resuming playback after pausing and seeking to backward,
there is a noise.
-Rootcause: When Resuming a Playback after Pausing and seeking,
AudioResampler's reset() function is resetting their member
variables but derived classes' s member variable are not resetting.
This is causing a noise in Playback because AudioResamplerSinc,
AudioResamplerOrder1 and AudioResamplerCubic's member variables
pointing to some previous state/values.
-Fix: To reset the derived class member variables,
override the reset function in all the derived classes.

Change-Id: I0584947ac203f9470cdc4a680ebccadf60e4e7db
CRs-Fixed: 482838