extractor: load extractors on boot, not on request.

Test: build + dumpsys media.extractor
Bug: 131106476
Change-Id: Idbea788340c4849f1286727c159a8eb43d6a7bb0

media/libstagefright/MediaExtractorFactory.cpp

@@ -71,8 +71,6 @@ sp<IMediaExtractor> MediaExtractorFactory::CreateFromService(
 
     ALOGV("MediaExtractorFactory::CreateFromService %s", mime);
 
-    UpdateExtractors();
-
     // initialize source decryption if needed
     source->DrmInitialization(nullptr /* mime */);
 
@@ -270,7 +268,7 @@ static bool compareFunc(const sp<ExtractorPlugin>& first, const sp<ExtractorPlug
 static std::unordered_set<std::string> gSupportedExtensions;
 
 // static
-void MediaExtractorFactory::UpdateExtractors() {
+void MediaExtractorFactory::LoadExtractors() {
     Mutex::Autolock autoLock(gPluginMutex);
 
     if (gPluginsRegistered) {

media/libstagefright/include/media/stagefright/MediaExtractorFactory.h

@@ -37,6 +37,7 @@ public:
             const sp<DataSource> &source, const char *mime = NULL);
     static status_t dump(int fd, const Vector<String16>& args);
     static std::unordered_set<std::string> getSupportedTypes();
+    static void LoadExtractors();
 
 private:
     static Mutex gPluginMutex;
@@ -53,8 +54,6 @@ private:
     static void *sniff(const sp<DataSource> &source,
             float *confidence, void **meta, FreeMetaFunc *freeMeta,
             sp<ExtractorPlugin> &plugin, uint32_t *creatorVersion);
-
-    static void UpdateExtractors();
 };
 
 }  // namespace android

services/mediaextractor/MediaExtractorService.cpp

@@ -30,7 +30,9 @@
 namespace android {
 
 MediaExtractorService::MediaExtractorService()
-        : BnMediaExtractorService() { }
+        : BnMediaExtractorService() {
+    MediaExtractorFactory::LoadExtractors();
+}
 
 sp<IMediaExtractor> MediaExtractorService::makeExtractor(
         const sp<IDataSource> &remoteSource, const char *mime) {