Move libmediahelper into a new folder.

This change mainly aims at refactoring libmediahelper. Libmediahelper
doesn't need to be stored in media folder. In that case, move
libmediahelper related file to a new folder. In the meantime, move
AudioParameter.h from libaudioclient to libmediahelper. There is no
need to keep AudioParameter.h in libaudioclient while AudioParameter.cpp
is in libmediahelper.

Test: make
Bug: 135621476
Change-Id: Icce6615b7e3a68be8b7492f2a91922ab04464ca2
Merged-In: Icce6615b7e3a68be8b7492f2a91922ab04464ca2
diff --git a/media/libmediahelper/Android.bp b/media/libmediahelper/Android.bp
new file mode 100644
index 0000000..72edeec
--- /dev/null
+++ b/media/libmediahelper/Android.bp
@@ -0,0 +1,29 @@
+cc_library_headers {
+    name: "libmedia_helper_headers",
+    vendor_available: true,
+    export_include_dirs: ["include"],
+}
+
+cc_library {
+    name: "libmedia_helper",
+    vendor_available: true,
+    vndk: {
+        enabled: true,
+    },
+    double_loadable: true,
+    srcs: ["AudioParameter.cpp", "TypeConverter.cpp"],
+    cflags: [
+        "-Werror",
+        "-Wextra",
+        "-Wall",
+    ],
+    shared_libs: ["libutils", "liblog"],
+    header_libs: [
+        "libmedia_helper_headers",
+        "libaudio_system_headers",
+    ],
+    export_header_lib_headers: [
+        "libmedia_helper_headers",
+    ],
+    clang: true,
+}