This allows DownloadManager to use FDs, paving the way for downloading
directly to content:// Uris.
Also return flag indicating if deleteOlderFiles() actually deleted
anything. Update tests to verify.
Bug: 5287571
Change-Id: I2579e5e2113f31b2860d7b021bd61c91b6310963
More closely matches the object ownership pattern used by other
stream APIs. Callers must now explicitly finish(). Also fixes
write(int) bug by switching to Streams API.
Change-Id: I64f9c5887ef02496b1ce4e97ce6af5dad93b4be2
Switch DrmManagerClient to using CloseGuard to better track leaked
resources. Add DrmOutputStream which applies DRM transformation as
data is written, similar to FilterOutputStream. Also writes DRM
headers before closing.
Change-Id: Ic106a3e6f6ff666e4dda484fbd234a0849eec8c0
