Move some exported flags into 24Q3.aconfig

- use_bounds_for_width
The code dependency is already removed by I2c30b8e330b6d896888f08794ca30ca81c8a7f01

- word_style_auto
Code Dependency: I5949f357dade0e034fb64016e4eeac3df863c8c3
CTS: I0923b913450677a9a9fa96b53e00f89ec5b212b6

- letter_spacing_justification
Code Dependency: I98ab2af28ca24026eb6655324ea520e669f26e73
CTS: Ifc3033e3b9c8078903b9c071047c1003985e51a7

Bug: 63938206
Bug: 280005585
Bug: 283193133
Bug: 364533012
Flag: EXEMPT removing use_bounds_for_width
Test: N/A
Change-Id: Ic99ea27cfd0300b04fdd7bc1b252910d57039c61