Add memory usage tests for various scripts

Here is an example of test result:

android.text.PrecomputedTextMemoryUsageTest:
  MemoryUsage
    Arabic Hyphenation  : 26,087
    Arabic NoHyphenation: 26,087
    CJK Hyphenation     : 58,515
    CJK NoHyphenation   : 58,515
    Latin Hyphenation   : 38,333
    Latin NoHyphenation : 16,077

Bug: 72461923
Test: manually
Change-Id: If3df2243cf9901178b3fd34882fb20f499fef5ab