libbase: Shim old StartsWith function prototype

* The str parameter StartsWith function in libbase got changed
  from std::string to std::string_view in later android versions [1].

* Create a shim that provides the older StartsWith function.

[1]: ef973cee17

Change-Id: I116a32a739d6fa34ecc0d1a4acf8b2e3756910ea

Android.bp

@@ -256,7 +256,10 @@ cc_defaults {
 cc_library {
     name: "libbase_shim",
     shared_libs: ["libbase"],
-    srcs: ["libbase/logging.cpp"],
+    srcs: [
+        "libbase/logging.cpp",
+        "libbase/strings.cpp",
+    ],
     vendor: true
 }
 

libbase/strings.cpp

@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2023 The LineageOS Project
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <string.h>
+#include <string>
+
+namespace android {
+namespace base {
+bool StartsWith(const std::string& s, const char* prefix) {
+    return strncmp(s.c_str(), prefix, strlen(prefix)) == 0;
+}
+}  // namespace base
+}  // namespace android