Fix crash when starting a DM (#6419)

`AnchoredDraggable.requireOffset` was called before it was populated when displaying  `CreateDmConfirmationBottomSheet`, because the keyboard and the bottom sheet were causing conflicting animations related to the insets.

Hiding the keyboard before displaying the bottom sheet seems to fix the issue, and `skipPartiallyExpanded` results in a better UX (and also worked around the issue by itself).

libraries/androidutils/src/main/kotlin/io/element/android/libraries/androidutils/ui/View.kt

@@ -9,12 +9,15 @@
 package io.element.android.libraries.androidutils.ui
 
 import android.os.Build
+import android.os.Bundle
+import android.os.ResultReceiver
 import android.view.View
 import android.view.ViewTreeObserver
 import android.view.WindowInsets
 import android.view.inputmethod.InputMethodManager
 import androidx.core.content.getSystemService
 import kotlinx.coroutines.suspendCancellableCoroutine
+import kotlinx.coroutines.sync.Mutex
 import kotlin.coroutines.resume
 
 fun View.hideKeyboard() {
@@ -22,6 +25,32 @@ fun View.hideKeyboard() {
     imm?.hideSoftInputFromWindow(windowToken, 0)
 }
 
+suspend fun View.hideKeyboardAndAwaitAnimation() {
+    val imm = context?.getSystemService<InputMethodManager>()
+
+    val mutex = Mutex()
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+        setOnApplyWindowInsetsListener { view, insets ->
+            if (!insets.isVisible(WindowInsets.Type.ime())) {
+                mutex.unlock()
+            }
+            insets
+        }
+        imm?.hideSoftInputFromWindow(windowToken, 0)
+    } else {
+        @Suppress("DEPRECATION")
+        imm?.hideSoftInputFromWindow(windowToken, 0, object : ResultReceiver(null) {
+            override fun onReceiveResult(resultCode: Int, resultData: Bundle?) {
+                if (resultCode == InputMethodManager.RESULT_UNCHANGED_HIDDEN ||
+                    resultCode == InputMethodManager.RESULT_HIDDEN) {
+                    mutex.unlock()
+                }
+            }
+        })
+    }
+    mutex.lock()
+}
+
 fun View.showKeyboard(andRequestFocus: Boolean = false) {
     if (andRequestFocus) {
         requestFocus()

libraries/matrixui/src/main/kotlin/io/element/android/libraries/matrix/ui/components/CreateDmConfirmationBottomSheet.kt

@@ -15,6 +15,7 @@ import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Text
+import androidx.compose.material3.rememberModalBottomSheetState
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -54,14 +55,14 @@ fun CreateDmConfirmationBottomSheet(
     ModalBottomSheet(
         modifier = modifier,
         onDismissRequest = onDismiss,
+        sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true),
     ) {
         Column(
             modifier = Modifier
                 .fillMaxWidth()
-                .padding(horizontal = 16.dp),
+                .padding(top = 24.dp, bottom = 16.dp, start = 16.dp, end = 16.dp),
             horizontalAlignment = Alignment.CenterHorizontally,
         ) {
-            Spacer(modifier = Modifier.height(24.dp))
             Avatar(
                 avatarData = matrixUser.getAvatarData(AvatarSize.DmCreationConfirmation),
                 avatarType = AvatarType.User,
@@ -93,7 +94,6 @@ fun CreateDmConfirmationBottomSheet(
                 onClick = onDismiss,
                 text = stringResource(CommonStrings.action_cancel),
             )
-            Spacer(modifier = Modifier.height(16.dp))
         }
     }
 }