[ImgBot] Optimize images (#237)

*Total -- 2,162.84kb -> 1,856.20kb (14.18%)

/android/imgs/hearing-test.png -- 72.02kb -> 32.69kb (54.62%)
/android/imgs/customizations-1.png -- 187.73kb -> 147.89kb (21.22%)
/android/imgs/accessibility.png -- 175.15kb -> 139.03kb (20.62%)
/android/imgs/transparency.png -- 142.45kb -> 114.67kb (19.5%)
/android/imgs/hearing-aid-adjustments.png -- 118.17kb -> 95.98kb (18.78%)
/android/imgs/long-press.png -- 89.79kb -> 74.73kb (16.77%)
/linux/imgs/main-app.png -- 32.58kb -> 27.15kb (16.67%)
/android/imgs/settings-2.png -- 265.03kb -> 221.76kb (16.33%)
/android/imgs/hearing-aid.png -- 73.45kb -> 61.93kb (15.68%)
/android/imgs/customizations-2.png -- 300.41kb -> 264.08kb (12.09%)
/android/imgs/settings-1.png -- 199.67kb -> 186.42kb (6.64%)
/android/imgs/head-tracking-and-gestures.png -- 142.86kb -> 134.84kb (5.61%)
/android/app/src/main/res-apple/drawable/airpods_pro_3_case.png -- 51.93kb -> 50.72kb (2.34%)
/android/app/src/main/res-apple/drawable/airpods_4_case.png -- 51.93kb -> 50.72kb (2.34%)
/android/app/src/main/res-apple/drawable/airpods_2_case.png -- 51.93kb -> 50.72kb (2.34%)
/android/app/src/main/res-apple/drawable/airpods_pro_2_case.png -- 51.93kb -> 50.72kb (2.34%)
/android/app/src/main/res-apple/drawable/airpods_3_case.png -- 51.93kb -> 50.72kb (2.34%)
/android/app/src/main/res-apple/drawable/airpods_pro_1_case.png -- 51.93kb -> 50.72kb (2.34%)
/android/app/src/main/res-apple/drawable/airpods_1_case.png -- 51.93kb -> 50.72kb (2.34%)

Signed-off-by: ImgBotApp <[email protected]>
Co-authored-by: ImgBotApp <[email protected]>

Author: imgbot[bot]