Remove libmedia and libstagefright dependency from extractors

- MediaSource, DataSource and MediaExtractor are moved to
  libmediaextractor so that they can be used by extractor
  implementations without depending on libmedia and libstagefright.
- XXXFactory classes has been added in order not to expose CreateXXX
  methods in libmediaextractor.
- avc_utils is moved to libstagefright_foundation since most of
  extractor implementations are relying on that.

Test: build + post submit media CTS tests
Bug: 65851881
Change-Id: I7d5cf18dd25abc10478ac3f6e7d1828ad023e3fb
diff --git a/media/libmediaextractor/Android.bp b/media/libmediaextractor/Android.bp
new file mode 100644
index 0000000..c57cd41
--- /dev/null
+++ b/media/libmediaextractor/Android.bp
@@ -0,0 +1,42 @@
+cc_library_shared {
+    name: "libmediaextractor",
+    include_dirs: [
+        "frameworks/av/include",
+        "frameworks/av/media/libmediaextractor/include",
+    ],
+
+    export_include_dirs: ["include"],
+
+    cflags: [
+        "-Wno-multichar",
+        "-Werror",
+        "-Wall",
+    ],
+
+    shared_libs: [
+        "libmediametrics",
+        "libstagefright_foundation",
+        "libutils",
+        "libcutils",
+        "liblog",
+    ],
+
+    srcs: [
+        "DataSource.cpp",
+        "MediaSource.cpp",
+        "MediaExtractor.cpp",
+    ],
+
+    clang: true,
+
+    sanitize: {
+        misc_undefined: [
+            "unsigned-integer-overflow",
+            "signed-integer-overflow",
+        ],
+        cfi: true,
+        diag: {
+            cfi: true,
+        },
+    },
+}