Allow Gui File Selector filter to check among more extensions

For example now in Install menu we are seeing all files with .zip
extension, after this commit we can see also files with .ZIP extension.
Just add the extension between ";" separator.

Change-Id: I6ddd2a812a182570af3d76711b1e3e13740a466b

gui/Android.mk

@@ -95,6 +95,7 @@ endif
 
 LOCAL_C_INCLUDES += \
     bionic \
+    system/core/base/include \
     system/core/include \
     system/core/libpixelflinger/include
 

gui/fileselector.cpp

@@ -20,7 +20,15 @@
 #include <sys/stat.h>
 #include <dirent.h>
 #include <algorithm>
-
+#ifdef __ANDROID_API_M__
+#include <vector>
+#ifdef __ANDROID_API_N__
+#include <android-base/strings.h>
+#else
+#include <base/strings.h>
+#endif
+#else
+#endif
 extern "C" {
 #include "../twcommon.h"
 }
@@ -279,11 +287,31 @@ int GUIFileSelector::GetFileList(const std::string folder)
 			if (mShowNavFolders || (data.fileName != "." && data.fileName != ".."))
 				mFolderList.push_back(data);
 		} else if (data.fileType == DT_REG || data.fileType == DT_LNK || data.fileType == DT_BLK) {
-			if (mExtn.empty() || (data.fileName.length() > mExtn.length() && data.fileName.substr(data.fileName.length() - mExtn.length()) == mExtn)) {
-				if (mExtn == ".ab" && twadbbu::Check_ADB_Backup_File(path))
+#ifdef __ANDROID_API_M__
+			std::vector<std::string> mExtnResults = android::base::Split(mExtn, ";");
+			for (const std::string& mExtnElement : mExtnResults)
+			{
+				std::string mExtnName = android::base::Trim(mExtnElement);
+				if (mExtnName.empty() || (data.fileName.length() > mExtnName.length() && data.fileName.substr(data.fileName.length() - mExtnName.length()) == mExtnName)) {
+					if (mExtnName == ".ab" && twadbbu::Check_ADB_Backup_File(path))
+						mFolderList.push_back(data);
+					else
+						mFileList.push_back(data);
+			}
+#else //On android 5.1 we can't use android::base::Trim and Split so just use the first extension written in the list
+			std::size_t seppos = mExtn.find_first_of(";");
+			std::string mExtnf;
+			if (seppos!=std::string::npos){
+				mExtnf = mExtn.substr(0, seppos);
+			} else {
+			mExtnf = mExtn;
+			}
+			if (mExtnf.empty() || (data.fileName.length() > mExtnf.length() && data.fileName.substr(data.fileName.length() - mExtnf.length()) == mExtnf)) {
+				if (mExtnf == ".ab" && twadbbu::Check_ADB_Backup_File(path))
 					mFolderList.push_back(data);
 				else
 					mFileList.push_back(data);
+#endif
 			}
 		}
 	}