Part of Qualcomm L1 OEMCrypto integration on mako

bug: 8621521

This fixes a problem where insecure audio buffers were being
passed incorrectly as secure buffers to the trusted
environment's OEMCrypto_DecryptCTR.

This is a merge of the following changes from the widevine
git repository to android git repository:

https://widevine-internal-review.googlesource.com/#/c/5163/2
Allow selection of secure/non-secure buffers

https://widevine-internal-review.googlesource.com/#/c/5164/
Pass Secure Buffer Request to CDM

Change-Id: Iec1192a216305c6cf92c359b15b148eccc6ce6ce

libwvdrmengine/cdm/core/include/cdm_engine.h

@@ -85,6 +85,7 @@ class CdmEngine : public TimerHandler {
   // Accept encrypted buffer and return decrypted data.
   CdmResponseType Decrypt(const CdmSessionId& session_id,
                           bool is_encrypted,
+                          bool is_secure,
                           const KeyId& key_id,
                           const uint8_t* encrypt_buffer,
                           size_t encrypt_length,

libwvdrmengine/cdm/core/include/cdm_session.h

@@ -52,6 +52,7 @@ class CdmSession {
 
   // Decrypt() - Accept encrypted buffer and return decrypted data.
   CdmResponseType Decrypt(bool is_encrypted,
+                          bool is_secure,
                           const KeyId& key_id,
                           const uint8_t* encrypt_buffer,
                           size_t encrypt_length,

libwvdrmengine/cdm/core/include/crypto_session.h

@@ -66,6 +66,7 @@ class CryptoSession {
   // Media data path
   bool SelectKey(const std::string& key_id);
   CdmResponseType Decrypt(bool is_encrypted,
+                          bool is_secure,
                           const uint8_t* encrypt_buffer,
                           size_t encrypt_length,
                           const std::vector<uint8_t>& iv,