Upgrade Truth from 0.44 to 1.0

I'd like to add a custom CueSubject, and if we upgrade first
we won't have to migrate from Subject<S, T> to Subject later:
https://truth.dev/subject_named_actual_type_parameters.html

PiperOrigin-RevId: 283737561

RELEASENOTES.md

@@ -24,6 +24,7 @@
 * Make media session connector dispatch ACTION_SET_CAPTIONING_ENABLED.
 * Add support for position and overlapping start/end times in SSA/ASS subtitles
   ([#6320](https://github.com/google/ExoPlayer/issues/6320)).
+* Upgrade Truth dependency from 0.44 to 1.0.
 
 ### 2.11.0 (not yet released) ###
 

constants.gradle

@@ -36,7 +36,7 @@ project.ext {
     androidxTestJUnitVersion = '1.1.1'
     androidxTestRunnerVersion = '1.2.0'
     androidxTestRulesVersion = '1.2.0'
-    truthVersion = '0.44'
+    truthVersion = '1.0'
     modulePrefix = ':'
     if (gradle.ext.has('exoplayerModulePrefix')) {
         modulePrefix += gradle.ext.exoplayerModulePrefix