Fix performance regression by fixing keys used in Typeface.Builder

The key used in Typeface.Builder is different from the key used in
findFromCache method. The problem is key generation in Typeface.Builder
since the key should be created from requested parameters not the actual
font styles.

Here is the raw performance differences on walleye-userdebug

android.graphics.perftests.TypefaceCreatePerfTest(us):
  createFromResources: 248 -> 23: (-225, -90.7%)

Bug: 131167183
Test: manually collected perf test result.
Change-Id: Idea25095979707ac84b7f4bc1ede0c2daefd6127