Add SharedFilter to tuner frameworks.

The SharedFilter is used to share the Filter created by TIS to another
process. The TIS uses Filter.createSharedFilter() to create a token and
share it to another process. The new process will use
Tuner.openSharedFilter() to open that new token and create a
SharedFilter. The new process will be able to read the TIS owned
Filter's data with this new SharedFilter.

Bug: 196124225
Test: atest android.media.tv.tuner.cts on both AIDL and HIDL HAL.
Change-Id: Id93b30e4db242d35a3d1ae6023b967a90a78c448