Add 'cbcs' encryption scheme support in Android media.

media/base/encryption_scheme.h

Index: media/base/encryption_scheme.h
diff --git a/media/base/encryption_scheme.h b/media/base/encryption_scheme.h
index 37bea6710d264390a5b74cd920e10951ff34eba7..901a2940c43f94b3d7235da41264828fab3c13ac 100644
--- a/media/base/encryption_scheme.h
+++ b/media/base/encryption_scheme.h
@@ -42,14 +42,14 @@ class MEDIA_EXPORT EncryptionScheme {
 
     bool Matches(const Pattern& other) const;
 
-    uint32_t encrypt_blocks() const { return encrypt_blocks_; }
-    uint32_t skip_blocks() const { return skip_blocks_; }
+    uint8_t encrypt_blocks() const { return encrypt_blocks_; }
+    uint8_t skip_blocks() const { return skip_blocks_; }
 
     bool IsInEffect() const;
 
    private:
-    uint32_t encrypt_blocks_ = 0;
-    uint32_t skip_blocks_ = 0;
+    uint8_t encrypt_blocks_ = 0;
+    uint8_t skip_blocks_ = 0;
 
     // Allow copy and assignment.
   };