Remove hardcoded color on save button

[jdauphant]

Type of change

• Feature
• Bugfix
• Technical
• Other :

Content

Save button background color is hardcoded. Now we use the theming colors instead.

Similar to :

• Remove hardcoded color on send button #8142

Motivation and context

Screenshots / GIFs

Tests

• Edit a message

Tested devices

• Physical
• Emulator
• OS version(s):

Checklist

• Changes has been tested on an Android device or Android emulator with API 21
• UI change has been tested on both light and dark themes
• Accessibility has been taken into account. See https://github.com/vector-im/element-android/blob/develop/CONTRIBUTING.md#accessibility
• Pull request is based on the develop branch
• Pull request includes a new file under ./changelog.d. See https://github.com/vector-im/element-android/blob/develop/CONTRIBUTING.md#changelog
• Pull request includes screenshots or videos if containing UI changes
• Pull request includes a sign off
• You've made a self review of your PR
• If you have modified the screen flow, or added new screens to the application, you have updated the test UiAllScreensSanityTest.allScreensTest()

Signed-off-by: Julien DAUPHANT [email protected]

[jdauphant]

🤔 we may have the same problem with https://github.com/vector-im/element-android/blob/develop/vector/src/main/res/drawable/ic_composer_rich_mic_pressed.xml

[bmarty]

Thanks for the change @jdauphant , can you add a sign-off so that we can merge the PR?

[jdauphant]

@bmarty I have added the signoff in the pull request comment. Is that good ?

[bmarty]

Thanks!