android: add optmized charge limit config

android/app/src/main/java/me/kavishdevar/librepods/bluetooth/AACPManager.kt

@@ -109,7 +109,8 @@ class AACPManager {
             EAR_DETECTION_CONFIG(0x0A), AUTOMATIC_CONNECTION_CONFIG(0x20), OWNS_CONNECTION(0x06), PPE_TOGGLE_CONFIG(
                 0x37
             ),
-            PPE_CAP_LEVEL_CONFIG(0x38);
+            PPE_CAP_LEVEL_CONFIG(0x38),
+            DYNAMIC_END_OF_CHARGE(0x3B);
 
             companion object {
                 fun fromByte(byte: Byte): ControlCommandIdentifiers? =

android/app/src/main/java/me/kavishdevar/librepods/presentation/screens/AirPodsSettingsScreen.kt

@@ -398,6 +398,16 @@ fun AirPodsSettingsScreen(viewModel: AirPodsViewModel, navController: NavControl
                     }
                 }
 
+                item(key = "spacer_dynamic_end_of_charge") { Spacer(modifier = Modifier.height(16.dp)) }
+                item(key = "dynamic_end_of_charge") {
+                    StyledToggle(
+                        label = stringResource(R.string.optimized_charging),
+                        description = stringResource(R.string.optimized_charging_description),
+                        checked = state.dynamicEndOfCharge,
+                        onCheckedChange = viewModel::setDynamicEndOfCharge
+                    )
+                }
+
                 item(key = "spacer_accessibility") { Spacer(modifier = Modifier.height(16.dp)) }
                 item(key = "accessibility") {
                     NavigationButton(

android/app/src/main/java/me/kavishdevar/librepods/presentation/viewmodel/AirPodsViewModel.kt

@@ -89,7 +89,9 @@ data class AirPodsUiState(
     val hearingAidData: ByteArray = byteArrayOf(),
 
     val isPremium: Boolean = false,
-    val vendorIdHook: Boolean = false
+    val vendorIdHook: Boolean = false,
+
+    val dynamicEndOfCharge: Boolean = false
 )
 
 class AirPodsViewModel(
@@ -268,9 +270,16 @@ class AirPodsViewModel(
                 val current = state.controlStates[identifier]
                 if (current?.contentEquals(value) == true) return@update state
 
-                state.copy(
-                    controlStates = state.controlStates + (identifier to value)
-                )
+                if (identifier == ControlCommandIdentifiers.DYNAMIC_END_OF_CHARGE) {
+                    state.copy(
+                        dynamicEndOfCharge = value[0] == 0x01.toByte(),
+                        controlStates = state.controlStates + (identifier to value)
+                    )
+                } else {
+                    state.copy(
+                        controlStates = state.controlStates + (identifier to value)
+                    )
+                }
             }
         }
 
@@ -305,6 +314,7 @@ class AirPodsViewModel(
             ControlCommandIdentifiers.AUTOMATIC_CONNECTION_CONFIG,
             ControlCommandIdentifiers.OWNS_CONNECTION,
             ControlCommandIdentifiers.PPE_TOGGLE_CONFIG,
+            ControlCommandIdentifiers.DYNAMIC_END_OF_CHARGE
         )
         for (identifier in identifiersList) {
             observeControl(identifier)
@@ -342,6 +352,7 @@ class AirPodsViewModel(
             ) ?: "CYCLE_NOISE_CONTROL_MODES"
         )
         val vendorIdHook = xposedRemotePref.getBoolean("vendor_id_hook", false)
+        val dynamicEndOfCharge = sharedPreferences.getBoolean("dynamic_end_of_charge", false)
 
         _uiState.update {
             it.copy(
@@ -351,7 +362,8 @@ class AirPodsViewModel(
                 headGesturesEnabled = headGesturesEnabled,
                 leftAction = leftAction,
                 rightAction = rightAction,
-                vendorIdHook = vendorIdHook
+                vendorIdHook = vendorIdHook,
+                dynamicEndOfCharge = dynamicEndOfCharge
             )
         }
     }
@@ -371,6 +383,14 @@ class AirPodsViewModel(
         }
     }
 
+    fun setDynamicEndOfCharge(enabled: Boolean) {
+        service.aacpManager.sendControlCommand(ControlCommandIdentifiers.DYNAMIC_END_OF_CHARGE.value, enabled)
+        sharedPreferences.edit { putBoolean("dynamic_end_of_charge", enabled) }
+        _uiState.update {
+            it.copy(dynamicEndOfCharge = enabled)
+        }
+    }
+
     private fun loadControlList() {
         _uiState.update {
             it.copy(

android/app/src/main/res/values/strings.xml

@@ -272,4 +272,6 @@
     <string name="app_enabled_in_xposed">App enabled in Xposed</string>
     <string name="subject">Subject</string>
     <string name="describe_your_issue">Describe your issue</string>
+    <string name="optimized_charging">Optimized Charge Limit</string>
+    <string name="optimized_charging_description">AirPods can learn from your daily usage and determine when to charge to an optmized limit and when to allow or full charge. This limit adapts to your daily usage and preserves your battery lifespan over time.\\nThis setting may not affect unsupported AirPods, or AirPods on an older firmware version.</string>
 </resources>