linker: Cleanup for Android's inclusive language guidance

1. Cleanup for #inclusivefixit. (whitelisted -> allowed_libs)
2. Support the old term for backwards compatibility. (Also update test.)
3. Fix the formatting errors found by clang-format.

See https://source.android.com/setup/contribute/respectful-code
for reference.

Bug: 161896447
Test: atest linker-unit-tests linker-benchmarks
Change-Id: I19dbed27a6d874ac0049cb7b67d2cb0f75369c1b

linker/linker_namespaces.h

diff --git a/linker/linker_namespaces.h b/linker/linker_namespaces.h
index 6843ebc..3c2dc20 100644
--- a/linker/linker_namespaces.h
+++ b/linker/linker_namespaces.h
@@ -118,14 +118,12 @@
     permitted_paths_ = permitted_paths;
   }
 
-  const std::vector<std::string>& get_whitelisted_libs() const {
-    return whitelisted_libs_;
+  const std::vector<std::string>& get_allowed_libs() const { return allowed_libs_; }
+  void set_allowed_libs(std::vector<std::string>&& allowed_libs) {
+    allowed_libs_ = std::move(allowed_libs);
   }
-  void set_whitelisted_libs(std::vector<std::string>&& whitelisted_libs) {
-    whitelisted_libs_ = std::move(whitelisted_libs);
-  }
-  void set_whitelisted_libs(const std::vector<std::string>& whitelisted_libs) {
-    whitelisted_libs_ = whitelisted_libs;
+  void set_allowed_libs(const std::vector<std::string>& allowed_libs) {
+    allowed_libs_ = allowed_libs;
   }
 
   const std::vector<android_namespace_link_t>& linked_namespaces() const {
@@ -176,7 +174,7 @@
   std::vector<std::string> ld_library_paths_;
   std::vector<std::string> default_library_paths_;
   std::vector<std::string> permitted_paths_;
-  std::vector<std::string> whitelisted_libs_;
+  std::vector<std::string> allowed_libs_;
   // Loader looks into linked namespace if it was not able
   // to find a library in this namespace. Note that library
   // lookup in linked namespaces are limited by the list of