734aea940b
[ Merge of http://go/wvgerrit/96514 ] The combined decryption call feature was introduced in android R. In earlier releases, subsamples were passed one at a time for decryption within the plugin. A decryption request that consists entirely of clear data should be passed on to OEMCrypto even if no keys are loaded. A sample might consist of subsamples of clear and protected data. In legacy mode, this proved to be an issue for OEMCrypto if the clear subsamples were passed on but the protected ones were rejected (b/110251447). For legacy mode and in the absence of keys being loaded, the subsample will be passed to OEMCrypto only if the clear lead/frame is in a single subsample and not broken up across multiple subsamples. Bug: 150316417 Test: WV android unit/integration tests Change-Id: Iff8ae8f58530cb9c5d31ce388742443ae807c16f