DO NOT MERGE - fix truncated boot sound

Wait for audioserver service initialization to complete
before playing the sound

Bug: 31651778
Change-Id: I988de549d20468a090c939a1c624ee47d4036cd3

cmds/bootanimation/Android.mk

@@ -23,7 +23,8 @@ LOCAL_SHARED_LIBRARIES := \
     libEGL \
     libGLESv1_CM \
     libgui \
-    libtinyalsa
+    libtinyalsa \
+    libmedia
 
 LOCAL_MODULE:= bootanimation
 

cmds/bootanimation/AudioPlayer.cpp

@@ -23,6 +23,7 @@
 #include <tinyalsa/asoundlib.h>
 #include <utils/Log.h>
 #include <utils/String8.h>
+#include <media/AudioSystem.h>
 
 #define ID_RIFF 0x46464952
 #define ID_WAVE 0x45564157
@@ -143,6 +144,9 @@ bool AudioPlayer::init(const char* config)
     struct mixer* mixer = NULL;
     char    name[MAX_LINE_LENGTH];
 
+    // Fake call to wait for audio HAL initialization completion
+    AudioSystem::getParameters(String8(""));
+
     for (;;) {
         const char* endl = strstr(config, "\n");
         if (!endl) break;