IDrm: remove IBinder inheritance

Bug: 134787536
Test: GtsMediaTestCases
Change-Id: I8e409e7048c9058f2d91ad2d467131f49e378259

drm/libmediadrm/Android.bp

@@ -17,7 +17,6 @@ cc_library_shared {
     srcs: [
         "DrmPluginPath.cpp",
         "DrmSessionManager.cpp",
-        "IDrm.cpp",
         "IDrmClient.cpp",
         "IMediaDrmService.cpp",
         "SharedLibrary.cpp",

drm/libmediadrm/include/mediadrm/DrmHal.h

@@ -57,7 +57,7 @@ inline bool operator==(const Vector<uint8_t> &l, const Vector<uint8_t> &r) {
     return memcmp(l.array(), r.array(), l.size()) == 0;
 }
 
-struct DrmHal : public BnDrm,
+struct DrmHal : public IDrm,
                 public IBinder::DeathRecipient,
                 public IDrmPluginListener_V1_2 {
 

drm/libmediadrm/include/mediadrm/IDrm.h

@@ -29,8 +29,9 @@ namespace android {
 
 struct AString;
 
-struct IDrm : public IInterface {
-    DECLARE_META_INTERFACE(Drm);
+struct IDrm : public virtual RefBase {
+
+    virtual ~IDrm() {}
 
     virtual status_t initCheck() const = 0;
 
@@ -146,17 +147,11 @@ struct IDrm : public IInterface {
 
     virtual status_t setListener(const sp<IDrmClient>& listener) = 0;
 
-private:
-    DISALLOW_EVIL_CONSTRUCTORS(IDrm);
-};
+protected:
+    IDrm() {}
 
-struct BnDrm : public BnInterface<IDrm> {
-    virtual status_t onTransact(
-            uint32_t code, const Parcel &data, Parcel *reply,
-            uint32_t flags = 0);
 private:
-    void readVector(const Parcel &data, Vector<uint8_t> &vector) const;
-    void writeVector(Parcel *reply, Vector<uint8_t> const &vector) const;
+    DISALLOW_EVIL_CONSTRUCTORS(IDrm);
 };
 
 }  // namespace android