Develop - Color picker API impl

[sameerasw]

This pull request introduces a new color picker feature, improves resource optimization, and refines UI actions for the main activity. The most important changes are the addition of a custom ColorPickerActivity, updates to resource packaging and Proguard rules, and enhancements to the main activity's UI logic for tab-specific actions.

Color Picker Feature

• Added a new ColorPickerActivity that launches the system eye dropper intent, handles color selection, and displays a bottom sheet for further actions. This activity is registered in the manifest and used by the ColorPickerTileService instead of a third-party app. [1] [2] [3]

Resource Optimization and Packaging

• Enabled resource shrinking and minification for the release build, and added legacy JNI libs packaging to improve APK size and compatibility. [1] [2]
• Updated proguard-rules.pro to preserve essential classes for Gson, Shizuku, Kotlin Reflect, and internal repositories/registries, preventing over-minification.

Main Activity UI Enhancements

• Refactored the main activity's action bar logic to show tab-specific actions: added a segmented dropdown menu for freeze actions in the Freeze tab, a new automation button for DIY, and improved repo addition logic for Apps. [1] [2]
• Updated the visibility logic for settings and help icons in the main activity's toolbar to be tab-dependent.
• Integrated the new automation sheet trigger into the DIY screen and removed the floating action button for repo addition, moving this action to the Apps tab toolbar. [1] [2]
• Added imports for new UI components used in segmented dropdown menus and automation sheet triggers. [1] [2]