Merge "Remove unnecessary letter spaceing from the left and right of line" into main

core/api/current.txt

core/java/android/text/MeasuredParagraph.java

core/java/android/text/TextLine.java

...s/coretests/src/android/text/TextLineLetterSpacingTest.kt

graphics/java/android/graphics/Paint.java

graphics/java/android/graphics/text/MeasuredText.java

libs/hwui/FeatureFlags.h

libs/hwui/hwui/MinikinUtils.cpp

libs/hwui/hwui/Paint.h

libs/hwui/hwui/PaintImpl.cpp

libs/hwui/jni/android_graphics_Canvas.cpp