hwc: Get notified on media player death.

Add support to get notified of media player death.
This is useful in reseting secure sessions initiated by mediaserver.

Change-Id: I215b5b552a0874c86a07426cd7d16ed48f307b5d
diff --git a/libhwcomposer/hwc_qclient.cpp b/libhwcomposer/hwc_qclient.cpp
index 32dc451..ee31e6c 100644
--- a/libhwcomposer/hwc_qclient.cpp
+++ b/libhwcomposer/hwc_qclient.cpp
@@ -39,9 +39,14 @@
 namespace qClient {
 
 // ----------------------------------------------------------------------------
-QClient::QClient(hwc_context_t *ctx) : mHwcContext(ctx)
+QClient::QClient(hwc_context_t *ctx) : mHwcContext(ctx),
+        mMPDeathNotifier(new MPDeathNotifier(ctx))
 {
+
     ALOGD_IF(QCLIENT_DEBUG, "QClient Constructor invoked");
+    //The only way to make this class in this process subscribe to media
+    //player's death.
+    IMediaDeathNotifier::getMediaPlayerService();
 }
 
 QClient::~QClient()
@@ -80,4 +85,12 @@
         mHwcContext->proc->invalidate(mHwcContext->proc);
 }
 
+void QClient::MPDeathNotifier::died() {
+    ALOGD_IF(QCLIENT_DEBUG, "Media Player died");
+    mHwcContext->mSecuring = false;
+    mHwcContext->mSecureMode = false;
+    if(mHwcContext->proc)
+        mHwcContext->proc->invalidate(mHwcContext->proc);
+}
+
 }