can't copy/paste folders on sdcard from PC side in MTP mode

When copy/paste folders from PC (e.g. windows),
there's an extra white space at the end of the folder names.
It cause the mkdir call failed with *Invalid argument* on device.

bug: 139645636

Change-Id: I4f0c017fd086b87180ba014722cdcf4d988e8bc5

media/mtp/MtpServer.cpp

@@ -42,6 +42,7 @@
 #include "MtpServer.h"
 #include "MtpStorage.h"
 #include "MtpStringBuffer.h"
+#include "android-base/strings.h"
 
 namespace android {
 
@@ -955,6 +956,11 @@ MtpResponseCode MtpServer::doSendObjectInfo() {
     if (!mData.getString(modified)) return MTP_RESPONSE_INVALID_PARAMETER;     // date modified
     // keywords follow
 
+    int type = storage->getType();
+    if (type == MTP_STORAGE_REMOVABLE_RAM) {
+        std::string str = android::base::Trim((const char*)name);
+        name.set(str.c_str());
+    }
     ALOGV("name: %s format: 0x%04X (%s)\n", (const char*)name, format,
           MtpDebug::getFormatCodeName(format));
     time_t modifiedTime;