Bug 1812692 - TextInputDelegateTest Timeouts r=m_kato,geckoview-reviewers

Reducing the number of characters in the TextInputDelegateTest content
large test prevents timeouts from occurring when using UIAutomator.
UIAutomator tests will be reactivated in bug 1659818.

Differential Revision: https://phabricator.services.mozilla.com/D171899

mobile/android/geckoview/src/androidTest/java/org/mozilla/geckoview/test/TextInputDelegateTest.kt

@@ -817,7 +817,7 @@ class TextInputDelegateTest : BaseSessionTest() {
     // Child process updates require having a display.
     @Test
     fun inputConnection_largeText() {
-        val content = (1..1024000).map {
+        val content = (1..102400).map {
             ('a'..'z').random()
         }.joinToString("")
         setupContent(content)