Fix issue 1846343 - part 1

This change is the first part of a fix for issue 1846343, :
- Added new enum values for input sources in AudioRecord and MediaRecorder for voice uplink, downlink and uplink+downlink sources.
- renamed streamType to inputSource in all native functions handling audio record.

A second change is required in opencore author driver and android audio input to completely fix the issue.
diff --git a/media/libmedia/IAudioFlinger.cpp b/media/libmedia/IAudioFlinger.cpp
index 52bd7d4..eeaa54f 100644
--- a/media/libmedia/IAudioFlinger.cpp
+++ b/media/libmedia/IAudioFlinger.cpp
@@ -99,7 +99,7 @@
 
     virtual sp<IAudioRecord> openRecord(
                                 pid_t pid,
-                                int streamType,
+                                int inputSource,
                                 uint32_t sampleRate,
                                 int format,
                                 int channelCount,
@@ -110,7 +110,7 @@
         Parcel data, reply;
         data.writeInterfaceToken(IAudioFlinger::getInterfaceDescriptor());
         data.writeInt32(pid);
-        data.writeInt32(streamType);
+        data.writeInt32(inputSource);
         data.writeInt32(sampleRate);
         data.writeInt32(format);
         data.writeInt32(channelCount);
@@ -384,14 +384,14 @@
         case OPEN_RECORD: {
             CHECK_INTERFACE(IAudioFlinger, data, reply);
             pid_t pid = data.readInt32();
-            int streamType = data.readInt32();
+            int inputSource = data.readInt32();
             uint32_t sampleRate = data.readInt32();
             int format = data.readInt32();
             int channelCount = data.readInt32();
             size_t bufferCount = data.readInt32();
             uint32_t flags = data.readInt32();
             status_t status;
-            sp<IAudioRecord> record = openRecord(pid, streamType,
+            sp<IAudioRecord> record = openRecord(pid, inputSource,
                     sampleRate, format, channelCount, bufferCount, flags, &status);
             reply->writeInt32(status);
             reply->writeStrongBinder(record->asBinder());