installd: avoid vector<const T>

A container of const T uses std::allocator<const T>, which was an
undocumented libc++ extension that has been removed. See
llvm.org/PR96319.

Bug: http://b/349681543
Test: m installd_dexopt_test
Test: m MODULES-IN-frameworks-native
Change-Id: Ib4bdefbfd0d5ab5802d360253daeb697124a3128

Author: rprichard

cmds/installd/tests/installd_dexopt_test.cpp

@@ -1449,7 +1449,7 @@ TEST_F(ProfileTest, CopySystemProfileFailWrongProfileName) {
 
 class BootProfileTest : public ProfileTest {
   public:
-    std::vector<const std::string> extra_apps_;
+    std::vector<std::string> extra_apps_;
     std::vector<int64_t> extra_ce_data_inodes_;
 
     virtual void SetUp() {