feat: 支持系统、进程信息获取

BREAKING CHANGE:
支持系统、进程信息获取对外变更：
1.添加"/proc/meminfo" 获取系统内存使用情况
2.添加"/proc/filesystems" 获取文件系统信息
3.添加"/proc/[pid]/meminfo" 获取进程的内存占用信息
4.添加"/proc/[pid]/cpup" 获取进程的CPUP信息

Close #I6AMVG

Signed-off-by: zhushengle <zhushengle@huawei.com>
Change-Id: I8c1cab0bf956ced0cf16401907d869058d98cfa6

testsuites/unittest/process/fs/process_fs_test.cpp

@@ -80,6 +80,55 @@ HWTEST_F(ProcessFsTest, ItProcessFs001, TestSize.Level0)
     ItProcessFs001();
 }
 
+/**
+* @tc.name: Process_fs_Test_002
+* @tc.desc: System memory information acquisition test
+* @tc.type: FUNC
+* @tc.require: issueI6AMVG
+* @tc.author:
+*/
+HWTEST_F(ProcessFsTest, ItProcessFs002, TestSize.Level0)
+{
+    ItProcessFs002();
+}
+
+/**
+* @tc.name: Process_fs_Test_003
+* @tc.desc: Get the file system type information supported by the system test
+* @tc.type: FUNC
+* @tc.require: issueI6AMVG
+* @tc.author:
+*/
+HWTEST_F(ProcessFsTest, ItProcessFs003, TestSize.Level0)
+{
+    ItProcessFs003();
+}
+
+/**
+* @tc.name: Process_fs_Test_004
+* @tc.desc: Process memory information acquisition test
+* @tc.type: FUNC
+* @tc.require: issueI6AMVG
+* @tc.author:
+*/
+HWTEST_F(ProcessFsTest, ItProcessFs004, TestSize.Level0)
+{
+    ItProcessFs004();
+}
+
+/**
+* @tc.name: Process_fs_Test_005
+* @tc.desc: Process cpup information acquisition test
+* @tc.type: FUNC
+* @tc.require: issueI6AMVG
+* @tc.author:
+*/
+
+HWTEST_F(ProcessFsTest, ItProcessFs005, TestSize.Level0)
+{
+    ItProcessFs005();
+}
+
 /**
 * @tc.name: Process_fs_Test_007
 * @tc.desc: Process mount directory test