AAPT2: Fix raw string parsing

Trim whitespace of raw strings when parsing xml values. This change
trims the whitespace of style items. For example:

<item name="viewInflaterClass">com.helloworld.Inflater
</item>

This will be trimmed to not include a trailing whitespace.

Bug: 109666819
Test: aapt2_tests
Change-Id: I0c1fbb3abdc7e609316c92e59ccaf0573b07e5a7
diff --git a/tools/aapt2/ResourceParser.cpp b/tools/aapt2/ResourceParser.cpp
index 089c9e2..ef5912b 100644
--- a/tools/aapt2/ResourceParser.cpp
+++ b/tools/aapt2/ResourceParser.cpp
@@ -777,7 +777,8 @@
   if (allow_raw_value) {
     // We can't parse this so return a RawString if we are allowed.
     return util::make_unique<RawString>(
-        table_->string_pool.MakeRef(raw_value, StringPool::Context(config_)));
+        table_->string_pool.MakeRef(util::TrimWhitespace(raw_value),
+                                    StringPool::Context(config_)));
   }
   return {};
 }